Physics High School

You use a pulley to lift your bike to the ceiling for winter storage. when you bought the pulley, the salesman claimed that the pulley has a mechanical advantage of 10. while lifting the bike, you notice that the pulley is squeaking because it has rusted over the summer. you determine that the pulley now has an actual mechanical advantage of 3. what is its efficiency?

Answers

Answer 1
AMA- actual machine advantage
IMA- ideal / theoretical machine advantage

Efficiency = AMA / IMA
                 =3 / 10
                 =0.3
Answer 2

3

(actually over the theoretical

Related Questions

Why can't we see all types of waves in the electromagnetic spectrum?

Answers

The majority of EM waves are outside of "visible light spectrum." Humans have evolved to perceive just this narrow range of cisible colors, an no more.

Analyze at the image below and answer the question that follows.

Image by Edward H. Adelson

Square A and square B are the same color. This illusion demonstrates which of the following?

A. Illusions are influenced by perceptions of movement.
B. Illusions are influenced by perceptual constancies.
C. Illusions are influenced by the situational context.
D. Illusions are influenced by tricks in depth perception.

Answers

This illusion demonstrates illusions are influenced by the situational context. Hence, option C is correct.

What is an Illusion?

illusion, a distortion of a "real" sensory stimulus—that is, an interpretation that disagrees with objective "reality" as generally understood. One can say that a child is having an illusion if they believe that tree branches at night are goblins. An experience that appears to start without an outside source of stimulation is what separates an illusion from a hallucination. Both experiences are frequently and repeatedly experienced by almost everyone, although neither one is necessarily a symptom of a psychiatric disorder.

When information from "actual" external stimuli results in a false perception of an item or event, this is known as an illusion. Illusions are unique perceptual experiences.

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Final answer:

The checker shadow illusion demonstrates that illusions are influenced by perceptual constancies because our brains adjust colors based on context to maintain stable perceptions, despite variations in illumination. Option B is correct.

Explanation:

The optical illusion you’re referring to, often known as the checker shadow illusion created by Edward H. Adelson, illustrates that illusions are influenced by perceptual constancies. Square A and square B are indeed the same color, but our brain adjusts the perception based on the context, here influenced by the shadow. The brain tries to maintain color constancy, adjusting the way we perceive color under varying illumination. Therefore, the correct answer is B. Illusions are influenced by perceptual constancies.

Theories of color perception have shown that our visual system makes adjustments based on adjacent lighting conditions and the presence of edges. This processing helps to maintain a stable and consistent perception of color within our environment, which is why square B appears lighter than it really is, due to the compensating effect for the shadow cast by the cylinder.

This illusion is a profound demonstration of how our perceptual system can be tricked, indicating that our brain does not function like a passive camera but rather as an active interpreter of sensory information, projecting a consistent and stable view of the world around us.

you decide to measure the mass of an aircraft carrier in the CGS system.What unit does your measurement end up in?

Answers

pounds I believe? if not then I recommend google :)

Some scientists look at the boundary between two biological communities and see a sharp dividing line. Others looking at the same boundary see a gradual transition with much intermixing of species and many interactions between communities. Why are there such different interpretations of the same landscape?

Answers

This is for the reason that individuals are not continually taking a gander at precisely the same, and on the grounds that individuals' psyches of ten work distinctively and process data in marginally extraordinary ways getting diverse understandings of similar information.

You are holding a full bowl of hot soup while standing in the kitchen. As you begin moving, some of the soup spills out of the bowl onto the floor. Upon reflection, you realize that A) the soup spilled because of air resistance. B) if you had traveled faster this wouldn't have happened. C) the soup wanted to stay where it was, but you moved the bowl. D) the soup and the bowl act as one body with the same velocity.

Answers

Final answer:

The spillage of the soup as you began moving is explained by inertia, where the soup wanted to stay in place while the bowl was moved, according to Newton's first law of motion.

Explanation:

When you moved with a bowl of hot soup and it spilled, the reason is related to the concepts of inertia and Newton's first law of motion. According to this law, an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In this case, the soup wanted to stay where it was, but you moved the bowl, causing a change in motion for the bowl and not the soup, resulting in the soup spilling. Air resistance is not a significant factor in this context as it primarily affects objects moving through the air and is related to how objects with different surface areas fall at different rates due to the force exerted opposite the motion.

True or False: _____ a) An object will have the same mass on the moon as it does on Earth. _____ b) An object will weigh more on the moon than on Earth. _____ c) If you tried to kick a bowling ball across the surface of the moon, it would be just as hard to accelerate it on the moon as it would on Earth. _____ d) A bowling ball would fall faster on Earth than on the moon.

Answers

A-True
B- False
C-False
D-True
Hope this helps

Which happened after the electromagnetic and weak nuclear forces were separated from the unified force?

Answers

-release of first light
-nucleosynthesis
-formation of stars and galaxies
-formation of elementary particles
Final answer:

The separation of the electromagnetic and weak nuclear forces from the unified electroweak force led to distinct electromagnetic and weak forces as the universe cooled, which contributed to the conditions necessary for the formation of nucleons.

Explanation:

After the electromagnetic and weak nuclear forces were separated from the unified electroweak force, the universe progressed towards the age of nucleons where leptons and hadrons, including protons and neutrons, were in thermal equilibrium. The electroweak force, which combined the electromagnetic and weak nuclear forces at very high temperatures and densities present in the early universe, broke into distinct forces as the universe cooled down. This occurred shortly after the strong nuclear force had already separated from the electroweak force. Importantly, the electric and magnetic forces, despite being different aspects of the single electromagnetic force, remain unified and do not separate under cooler conditions because they rely on each other.

What did the bataan death march foreshadow about the war in the pacific?

Answers

The Bataan Death March foreshadowed that Japan either had no intentions of abiding by international law set in the Geneva Convention. It was either that or they  merely ignored or belittled it.

The Bataan Death March was one of the earliest record of the most severe treatment of Prisoner's of War in the world. During WWII, thousands of Filipino and American troops who surrendered to the Japanese forces in Bataan were made to walk some 65 miles to the POW camp. Whether sick, injured or dying, no medical treatment was given and they all had to march or would be killed.  

A tourist bus is carrying passengers from the bottom of a hill to the top. The people, the bus, and the luggage can be analyzed as a single machine structure system . The total amount of energy in the system decreases increases remains the same as the bus travels. This situation happens because some of the kinetic energy changes to kinetic potential thermal energy because of friction between the tires and the road.

Answers

Answer:

A tourist bus is carrying passengers from the bottom of a hill to the top. The people, the bus, and the luggage can be analyzed as a single system. The total amount of energy in the system decreases as the bus travels. his situation happens because some of the kinetic energy changes to thermal energy because of friction between the tires and the road.

Explanation:

Answer:

system

decreases

thermal

Explanation: edmentum

Select the correct answer. In a water park, people walk up a ramp before diving into the water below. If they cover a horizontal distance of 100 meters before diving down 50 meters, what is the angle made by the ramp with the ground? 30.0° 60.3° 26.6° 50.3°

Answers

Answer: 26.6 °

Explanation:

1) You can draw a triangle with the unknown angle, the horizontal distance covered and the vertical diving distance.

2) In that triangle, the vertical distance is opposite to the angle unknown and the horizontal distance is adjacent to the same angle.

3) Then you can use the trigonometric ratio tangent to relate the three variables:

tan (α) = opposite-leg / adjacent-leg = 50m / 100m = 0.5

4) The tangent equal to 0.5 is not a notable value, so you should use the inverse tangent function that is included in every scientific calculator:

=> α = arc tan(0.5) ≈ 26.6 °


A mystery liquid was given to you by an investigator. He is trying to identify it by looking at its physical characteristics. You measure out 20.0 milliliters of the liquid and find its mass to be 15.9 grams. According to the table, which liquid do you believe is the mystery substance? A) Lamp oil B) Baby oil C) Vegetable oil D) Rubbing alcohol

Answers

Density has units of grams/mL

So divide grams by milliliters to get the density.

15.8 g / 20 mL  = 0.795 g/mL

that's a very low density so I'm going to guess it's the rubbing alcohol but look in tables provided to you.
Final answer:

The mystery liquid can be identified by calculating its density using the given mass and volume, and then comparing this with the densities of the available substances.

Explanation:

To identify the mystery liquid, you can calculate its density using the formula for density: density = mass/volume.

We know that the volume of the liquid is 20.0 milliliters and the mass is 15.9 grams, so the density would be 15.9g/20.0ml = 0.795 g/ml.

Now, we'll need to compare this density with the densities of the listed substances (lamp oil, baby oil, vegetable oil, and rubbing alcohol). The option that matches this density most closely would identify the mystery liquid. Since this information is not provided in the question, we can't definitively identify the liquid.

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22)Identify one piece of evidence that led astronomers to infer that the universe is expanding?
23)Identify the force that caused stars and planets in the universe to become layered according to density differences in their composition?
24)Identify the nuclear process that combines lighter elements into heavier elements to produce the energy radiated by stars?

Answers

22) One of the first (and strongest) evidences that universe is expanding is Hubble's observation of the redshift of galaxies. In fact, Hubbles studied the light coming from distant galaxies, and by analyzing the redshift of the wavelength of the light coming from those galaxies, he understood that the distance of those galaxies from us were increasing, and so that the universe is expanding.

23) The force responsible for this effect is gravity. In fact, in a planet or in a star the heavier elements experience a stronger gravitational force, therefore they are attracted to the center of the planet/star, while the lighter elements (that experience a weaker gravitational force) remain in the outer regions of the planet/star, creating a "layered structure" with higher density in the center and smaller density in the outer regions.

24) This process is called nuclear fusion. Nuclear fusion occurs mainly in stars: because of the extremely high temperature, the nuclei of lighter elements are able to overcome the electrostatic repulsion between each other, and they are able to become close enough to be in the range of the strong nuclear interaction: the two nuclei combine together into heavier elements, and the mass lost in the process is converted into energy, according to Einstein's relationship:
[tex]E=mc^2[/tex]

__________ are seismic waves that pass through the earth's interior, spreading out from the focus in all directions.

Answers

P-waves and S-waves are seismic waves that pass through the earth's interior, spreading out from the focus in all directions. . P-waves move through solids, liquids, and gases, while S-waves travel only through solids.

Seismic waves are energy waves generated during earthquakes that travel through the Earth's interior, spreading out from the focus.

These waves are categorized into two main types: body waves and surface waves. Body waves, which travel through the Earth's interior, include P-waves (primary waves) and S-waves (secondary waves).Body waves are the first to propagate out from the focus of an earthquake. P-waves are compressional waves that move rock particles forward and backward in the direction of wave travel, allowing them to pass through solids, liquids, and gases. S-waves follow P-waves and are shear waves that move rock particles side-to-side, but they can only travel through solids, not through liquids or gases.Geologists study these seismic waves to understand earthquakes and the Earth's interior structure. As seismic waves travel through different materials, their speed changes, which helps scientists determine the density and composition of various layers within the Earth.

A cat dozes on a stationary merry-go-round, at a radius of 4.6 m from the center of the ride. then the operator turns on the ride and brings it up to its proper turning rate of one complete rotation every 5.5 s. what is the least coefficient of static friction between the cat and the merry-go-round that will allow the cat to stay in place, without sliding?

Answers

Radius = 4.6 m
 Time for one complete rotation t = 5.5 s.
 Distance = 2 x 3.14 x R = 2 x 3.14 x 4.6 m = 28.888.
 Velocity V = distance / time = 28.888 / 5.5 s = 5.25 m/s
 Force exerted by cat Fc = mV^2 / R = (mx 5.25^2) / 4.6 m
  Force of the cat Fc = 6m, m being the mass.
 Normal force = Us x m x g = Us x m x 9.81 = Us9.81m
 equating the both forces => Us9.81m = 6m => Us = 6 / 9.81 => Us = 0.6116 So coefficient of static friction = 0.6116

A spring with a spring constant k of 44 n/m is stretched a distance of 14 cm (0.14 m) from its original unstretched position. what is the increase in potential energy of the spring? j

Answers

The elastic potential energy of a spring is given by
[tex]U= \frac{1}{2} k x^2 [/tex]
where k is the spring's constant and x is the displacement with respect to its unstretched position. 

The initial potential energy of the spring is zero, because it is in unstretched postion, therefore x=0. The final potential energy is instead, using [tex]k=44 N/m[/tex] and [tex]x=0.14 m[/tex],
[tex]U_f = \frac{1}{2} (44 N/m)(0.14 m)^2 = 0.43 J[/tex]

And so, the increase in potential energy is 
[tex]\Delta U=U_f - U_i = 0.43 J-0 J=0.43 J[/tex]

which of the following astronomical bodies is the highest in hierarchy
earth
galaxy
solar system
star

Answers

Galaxy would be the highest in hierarchy because stars and planets are last and galaxies consist of solar systems so galaxy is the biggest.

Answer:

Galaxy

Explanation:

The astronomical body which is the highest in hierarchical order is the Galaxy.

The order of the astronomical body from the Highest to Lowest include

:Universe, galaxy, solar system, star, planet, moon and asteroid.

In the example above , the order of hierarchy from highest to lowest is Galaxy, Solar system, Star, Earth(planet).

A loop of wire carries a current. the resulting magnetic field __________.

Answers

We can apply Ampere's law to find the magnetic field generated by a loop of wire: taking any closed loop, the line integral of the magnetic field on this loop is equal to the product between the permeability [tex]\mu[/tex] times the current flowing through this loop. 

In our example, let's take a rectangular path with one side of length L parallel to to the axis of the wire loop. The contribution on the two other perpendicular sides is zero, as well as for the side outside the wire loop, so the only relevant contribution of the magnetic field is BL. So we have
[tex]BL = \mu I N[/tex]
where I is the current flowing through the wire loop, and N the number of loops in the length L. So we can write the magnetic field inside the wire loop as
[tex]B=\mu \frac{N}{L} I=\mu n I[/tex]
where [tex]n= \frac{N}{L} [/tex] is the number of loops per unit of length.

Using the right hand rule, one can see that the field inside the wire loop has the same direction of the axis of the wire loop, while the contribution outside the wire loop is negligible.
Final answer:

A loop of wire carrying a current generates a magnetic field, exerting a force and torque on the loop. The direction of this field is determined by the right hand rule and the force and torque by the equations F = I x B and t = μ × B respectively.

Explanation:

A loop of wire that carries a current generates a magnetic field. This magnetic field exerts a force and torque on the loop. This is especially the case in devices such as a motor.

The resulting magnetic field generated by a current-carrying loop is influenced by the right hand rule. This rule describes the direction of the magnetic field, where your thumb points in the direction of the current and your fingers wrap around the wire in the direction of the magnetic field. The density of the magnetic field lines is determined by the magnitude of the current and the size of the loop.

The force that the magnetic field applies to the loop is given by F = I x B, while the torque is given by t = μ × B. μ represents the magnetic dipole moment of the loop, and B is the strength of the magnetic field. The exact forces will depend on the specifics of the geometry and composition of the loop, as well as the strength and direction of the magnetic field itself.

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When driving at night switch to low-beams whenever you come within ___ ft of an oncoming vehicle.
A. 300
B. 500
C. 200

Answers

Answer:

500 ft

Explanation: One must dim their high-beam lights when the oncoming vehicle is  500 ft away so that the oncoming driver can look clearly and drive safely. High beam light should be used at night to drive safely when one is not able to see ahead of the road clearly. Even for the most experienced drivers low visibility is an issue.

Final answer:

You should switch to low-beams when you come within 500 feet of an oncoming vehicle when driving at night to avoid blinding other drivers, equivalent to about 1.5 American football fields.

Explanation:

When driving at night, it is recommended to switch to low-beams whenever you come within 500 feet of an oncoming vehicle. This is important as it helps to prevent blinding the other driver with your vehicle's headlights, making the roads safer for everyone. To put the distance into perspective, 500 feet is approximately the length of 1.5 American football fields.

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One atom has 14 neutrons. Another has 13 neutrons. Both have 13 protons. These atoms are...

A. isotopes
B. different elements
C. Molecules
D. Ions

Answers

Hello!

These atoms are isotopes

Isotopes are atoms with the same number of protons (which determine the atomic number) and a different number of neutrons. These two atoms have the same number of protons (13), but a different number of neutrons, so they are isotopes. 

According to their number of protons, these are Aluminum isotopes: ²⁷Al (stable), and ²⁶Al (radioactive), respectively. 

Have a nice day!

How does the capacitance of two identical capacitors connected in series compare to that of one of the capacitors?

Answers

Don't add, whatever you do. This is how it should be done.

1/c = 1/c1 + 1/c1
1/c = (c1 + c1)/(c1*c1)
1/c = 2c1/c1^2 = 2/c1
c = c1/2 divide the value of one of the  original capacitors by 2.

It means that whatever the value of one of the 2 capacitors is, you get the result of the two capacitors by dividing the value of one of them by 2.

It is similar to the result of putting 2 equal resistors in parallel. 

A helicopter is traveling at 86.0 km/h at an angle of 35° to the ground. What is the value of Ax? Round your answer to the nearest tenth. km/h

Answers

Yeah it is 70.4 for the Ax one and 49.3 for the Ay.

Final answer:

The value of Ax, the x component of the velocity of the helicopter, is approximately 70.5 km/h.

Explanation:

The question asks to determine the horizontal component of the velocity (Ax) of a helicopter traveling at 86.0 km/h at an angle of 35° to the ground. To find Ax, we can use the cosine component of the given velocity because the cosine of an angle in a right triangle gives the adjacent side over the hypotenuse, which corresponds to the horizontal component over the total velocity.

To find the value of Ax, we can break down the velocity vector of the helicopter into its x and y components. The x component of the velocity can be found using the formula Vx = V * cos(angle), where V is the magnitude of the velocity and angle is the angle with respect to the ground.

In this case, V = 86.0 km/h and angle = 35°. Plugging in these values, we get Vx = 86.0 km/h * cos(35°) = 70.5 km/h.

So, the value of Ax is approximately 70.5 km/h.

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Which theory argues that language shapes the way that we think?
Functionalist
Durkheimian
Whorfian
Freudian

Answers

The correct answer is whorfianism

a weather map shows a high pressure system with circles around it. what does this mean
a. an occluded front
b. areas of an equal altitude 
c. a stationary front
d. areas of equal

Answers

I think that it is equal pressure

Which one of the following statements best describes the just world hypothesis?   A. People deserve what happens to them, whether good or bad.   B. The world is just, but some people don't think it is.   C. People who work hard are superior to those who are lazy.   D. If people act with integrity, they contribute to a just world.

Answers

C. People who work hard are superior to those who are lazy. 

Answer:

A. People deserve what happens to them, whether good or bad.

Explanation:

The Just world hypothesis states that noble actions are rewarded and unjust actions are penalized. This hypothesis states that there is a force in the universe that restores the moral balance. This can be better understood by sayings like "what goes around comes around" and "you got what was coming to you".

So, bad people deserve something bad happening to them and good people also deserve what is happening to them.

Frequency = 1/T
Based on the equation, determine what happens to the period, T, as the frequency increases

Answers

By definition, the period (T) is the time a cycle lasts and the frequency is the number of cycles per second.

 The equation Frequency=1/T, indicates that the period (T) is inversely proportional to the frequency. This means that when the frequency decreases, the period increases and when the frequency increases, the period decreases.

Answer:

the answer is B decreases

Explanation:

What is the average velocity between 12.00 and 15.00 seconds?

A) 81.0 m/s, east

B)27.00 m/s, east

C)9.00 m/s, east
D)0.0123 m/s, east




Answers

Subtract d(15) - d(12), then divide that by 3 because 3 sec between 12-15:
(225-144)/3 = 81/3 = 27m/s
B) 27.00 m/s, east

Answer: The velocity of abject in a given time interval from 12 seconds to 15 sec is 27 m/s.

Explanation:

Displacement of the object after 12.00 seconds = 144 m

Displacement of the object after 15.00 seconds = 225 m

[tex]Velocity=\frac{\text{Change in Displacement}}{\text{Change in time}}[/tex]

[tex]Velocity=\frac{225 m-144 m}{15 s-12 s}=\frac{81 m}{3 s}=9m/s[/tex]

The velocity of abject in a given time interval from 12 seconds to 15 sec is 27 m/s.

Give an example of nonpoint-source pollution

Answers

Nonpoint source pollution is pollution that affects bodies of water, so remembering this can help in the future with this type of question. Some examples of nonpoint source pollution are; Excess fertilizers and herbicides, oil and toxic chemical runoff, as well as sediment from eroding stream banks. I hope this helps :)

Please answer as soon as possible!
A 3.0 cm object is 12.0 cm from a convex mirror that has a focal length of 20.0 cm.
What is the distance of the image from the mirror?
____cm
What is the height of the image?
___cm

Answers

(a) The mirror equation which relates the focal length f, the distance of the object [tex]d_o[/tex] and the distance of the image [tex]d_i[/tex] is 
[tex] \frac{1}{f}= \frac{1}{d_o} + \frac{1}{d_i} [/tex]
where for sign convention we take the focal length of a convex mirror as negative : [tex]f=-20 cm[/tex].
Since we know the distance of the object from the mirror, [tex]d_o=12 cm[/tex], we can find the distance of the image:
[tex] \frac{1}{-20}= \frac{1}{12} + \frac{1}{d_i} [/tex]
from which 
[tex]d_i=-7.52 cm[/tex]
where the negative sign means the image is virtual (located behind the mirror).

(b) We can find the height of the image through the magnification (M) equation:[tex]M= \frac{h_i}{h_o}= -\frac{d_i}{d_o} [/tex]
where [tex]h_i[/tex] and [tex]h_o[/tex] are the height of the image and the object, respectively
.Using [tex]h_o=3 cm[/tex] we can find [tex]h_i[/tex]:
[tex]h_i=h_o ( \frac{-d_i}{d_o})=(3 cm)( \frac{7.52 cm}{12 cm} )=1.88 cm [/tex]
where the positive sign means the image is upright.

Answer:

-30 and 7.5

Explanation:

8. A 0.500 kg model rocket is initially pushed upwards by a thrust force of 15N. If the force of air resistance is 1.00 N, what is the initial acceleration of the rocket?

Answers

Resultant force = ma

15N - 1N = 0.5kg(a)
a = 14/0.5
a = 28 m/s2

Answer:

a = 18.19 [tex]m/s^{2}[/tex]

Explanation:

Given

Mass of the rocket m = 0.500 kg

upward force [tex]F_{up}[/tex] = 15 N

Air Resistance [tex]F_{Res}[/tex] = 1.00 N

Solution

Net force = Upward forces - downward forces

Net force = Upward force - (air resistance + weight)

[tex]F_{net} = x_{up} -(F_{Res} +mg )\\\\F_{net} = 15 -( 1 + 0.5 \times 9.81)\\\\F_{net} = 15 - (1+ 4.905)\\\\F_{net} = 9.095[/tex]

Net acceleration

[tex]a = \frac{F_{net} }{m} \\\\a = \frac{9.095 }{0.5}\\\\a = 18.19 m/s^{2}[/tex]

One end of a steel bridge is struck by a hammer. The sound produced is transmitted through the bridge and through the air to the other side of the bridge. There is a 1.4 s delay between the arrivals of the two sounds. What is the length of the bridge if the velocity of sound in air is 340 m/s and in steel is 5100 m/s. m

Answers

The sound in steel covers the distance L (length of the bridge) in a time [tex]t_S[/tex], with a velocity [tex]v_S=5100 m/s[/tex]:
[tex]v_S = \frac{L}{t_S} [/tex]
which we can rewrite as
[tex]L=v_S t_S[/tex] (1)

Similarly, the sound in air covers the length of the bridge L in a time [tex]t_A[/tex], with a velocity [tex]v_A=340 m/s[/tex]:
[tex]v_A = \frac{L}{t_A} [/tex]
which we can rewrite as
[tex]L=v_A t_A[/tex] (2)
We also know that the sound in air arrives with a delay of 1.4 s. This means we can rewrite tA as
[tex]t_A = t_S+1.4 s[/tex] (3)

The length of the bridge is always the same, so we can write (1)=(2) and using the information found in (3):
[tex]v_A (t_S+1.4)=v_S t_S[/tex]
Re-arranging, we find
[tex]t_S = \frac{1.4 v_A }{v_S -v_A}=0.1 s [/tex]

And at this point we can find the length of the bridge:
[tex]L=v_s t_S = (5100 m/s)(0.1 s)=510 m[/tex]

Final answer:

The length of the bridge is calculated by solving the equation derived from the sound travel times through air and steel, considering the 1.4 seconds delay. Upon calculation, the bridge length is found to be 476 meters.

Explanation:

To determine the length of the bridge given the time delay of sound arrival between steel and air, we need to establish two equations to represent the travel times of sound through both mediums. The first equation represents the time taken for sound to travel through the air ([tex]t_{air}[/tex]) and the second one for the time taken through steel ([tex]t_{steel}[/tex]). We know that sound travels faster in steel than air, so we can say:

[tex]t_{air}[/tex] = distance / speed in air = L / 340 m/s

[tex]t_{steel}[/tex] = distance / speed in steel = L / 5100 m/s

The delay between the two sounds was given as 1.4 seconds, so we can set up the following equation:

[tex]t_{air} - t_{steel}[/tex] = 1.4 s

(L / 340 m/s) - (L / 5100 m/s) = 1.4 s

Now, we solve for L (the length of the bridge), which results in:

L = 1.4 s / ((1/340 m/s) - (1/5100 m/s))

Upon calculation, L = 476 m

Therefore, the length of the bridge is 476 meters.

Other Questions
Which of these rhetorical devices was the author of the declaration using when he repeated "He" followed by a verb over and over again? Zach is filling his dogs bowl with water. Is it reasonable to say that Zach will need about 4 gallons of water? use the proportion to convert millimeters to centimeters. 10mm/1cm=47mm/x When Mendel crossed purebred purple flowering plants (PP) with purebred white flowering plants (pp), what were the flower colors of the resulting offspring? 25 percent white and 75 percent purple 50 percent white and 50 percent purple 100 percent purple 100 percent white Which of the following leaders was a Cambodian visionary who used his charismatic personality to reach dangerous goals? A. Pol Pot B. Josef Stalin C. Mohandas Ghandi D. Osama bin Laden how is convection defined in relationship of art history A. a large gathering of people who share a common interest B. a label for a group of artworks witch share the same styleC. the collection of art found in a art museumD. a common characteristics shared between artworks belonging to a group.Please Help Answer Which of the choices below explains why the arterioles are known as resistance vessels? Write a function numberofpennies() that returns the total number of pennies given a number of dollars and (optionally) a number of pennies. ex: 5 dollars and 6 pennies returns 506. what is the unlimited end of a high mass star that is greater than 2.8 times the mass of the sun Write a single scene that uses rich description to build suspense. Use vivid imagery that conveys elements of the supernatural in order to present a single, suspenseful moment to your readers Why do you think The Great Northern Railroad Company gave free seeds to settlers, who were willing to settle near the railroad tracks? Describe how the meteorite collision at the end of the mesozoic affected the atmosphere and the biosphere * I don't know how to end my essay after the last sentence because I feel I ended it very abruptly any suggestions*Where does one draw the line between your belief and your job obligations? Even if it's against ones belief to defend a client that has come clean, saying that they are in fact guilty, but they want to plead not guilty, should one still defend their client? There are many questions that need to be asked when defending the guilty, but I certainly believe that one should defend the guilty. One can distinguish between their belief and job obligation under the following circumstance in which they would feel that they wont be able to provide a good defense for their client because they would not want to defend a client whose admission of guilt is contrary to their clients stated position in court. I believe that one mustnt draw the line between their belief and job obligations because then you would denying people their 8th Amendment Constitutional right which clearly states ... nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws. I personally believe that you are violating your client's 6th amendment US Constitutional right which clearly states their unalienable right of having legal representation. According to the Morales law firm in San Francisco, lawyers are morally bound to defend their clients regardless of their innocence or guilt vigorously. Even if the client admits to the guilt, there's no knowing if that person actually committed the crime, they may be trying to protect someone or maybe guilty of a lesser crime. Even if I feel that it may be wrong to defend one in the case where my client is a murderer and my client has admitted to me that he/she has committed the crime. In the American Justice system, one is only accused of a crime until they are proven innocent or guilty. Based on the underlying basis of the system, I would still do my best effort to try and defend this client because I dont have to defend my client by having to insist that he/she is innocent. I can instead go the route of presenting the facts of the case through the best defense possible and leave it up to the jurors and the judge to determine the verdict (innocent or guilty). The Adversarial system in the US matches my beliefs of a person being innocent until proven guilty. The Adversarial system unlike its counterpart the Inquisitorial system allows the guilty the chance to try to prove their innocence. The Inquisitorial system does not allow for the guilty to try and defend their innocence. Since the Adversarial system in the US allows for the guilty the chance to prove their innocence I believe I am able to enter a plea of not guilty on their behalf. Which part of the US Constitution allows for the amendment process? Elevators have safety limits for how much weight they can lift. The elevator at the Terrace Hotel can hold up to 2,100 pounds. write an equation or inequality that represents the allowable weight on the elevator at the Terrace Hotel. Graph the solution to the equation or inequality you wrote on the number line. Explain your answer. The image formed by a convex spherical mirror will always be A. upright and larger than the object. B. upright and smaller than the object.C. inverted and larger than the object. D. inverted and smaller than the object.I dont believe its C or D. If you believe so can you please explain? Pennfoster Test On june 1 a school district levies the property taxes for its fiscal year that will end on june 30. the total amount of the levy is $1,000,000 and 1% is expected to be uncollectible. of the levy, $250,000 is collected in june and another 500,000 is collected in july and and august. what is the maximum amount of property tax revenue associated with the june 1 levy that the school district might report as revenue in the fiscal year ending june 30? An arrow shot into the air is 160t -16^2 feet above the ground t is seconds after it is released. During what period of time is the arrow above 384 feet? How did thomas jefferson react to shays's rebellion? 37.5 x 10 to the negative 6 in scientific notation?