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.
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
you decide to measure the mass of an aircraft carrier in the CGS system.What unit does your measurement end up in?
In the geologic past, the polarity of earth's magnetic field is ________.
Final answer:
The polarity of Earth's magnetic field has reversed multiple times in the geologic past, with these reversals occurring at irregular intervals. Scientists study magnetic characteristics of rocks to understand this phenomenon, which significantly impacts our interpretation of Earth's magnetic history.
Explanation:
In the geologic past, the polarity of Earth's magnetic field has experienced numerous reversals where the magnetic north pole moved to the geographic south pole and vice versa. This phenomenon is known as magnetic reversal. By analyzing the magnetic characteristics of volcanic rocks and other geological formations, scientists have been able to identify periods of normal and reversed magnetism.
During periods of reversed polarity, a compass would have pointed towards what is today considered the geographic south instead of the north, indicating a complete reversal of Earth's magnetic field. These reversals have occurred at irregular intervals throughout Earth's history, ranging from less than 0.1 million years to as much as 50 million years, with the most recent significant event, the Brunhes-Matuyama reversal, happening about 780,000 years ago.
A loop of wire carries a current. the resulting magnetic field __________.
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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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.
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.
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?
Which happened after the electromagnetic and weak nuclear forces were separated from the unified force?
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.
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?
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
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
Answer:
-30 and 7.5
Explanation:
Calcium carbonate can break down to form calcium oxide and carbon dioxide. CaCO3 → CaO + CO2 The oxygen atoms on the product side are
Answer: the answer is C balanced because the total number of oxygen atoms is 3.
Explanation: I know this cause I did the assignment and got it correct.
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
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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Frequency = 1/T
Based on the equation, determine what happens to the period, T, as the frequency increases
Answer:
the answer is B decreases
Explanation:
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.
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.
Give an example of nonpoint-source pollution
What did the bataan death march foreshadow about the war in the pacific?
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
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.
At full power, how long would it take for the car to accelerate from 0 to 62.0 mph ? neglect friction and air resistance.
It would take the car 4.6 seconds to accelerate from 0 to 62.0 mph at full power, neglecting friction and air resistance.
We can use the following equation to calculate the acceleration of the car:
[tex]a = \dfrac{v_f - v_i}{t}[/tex]
where:
a is the acceleration of the car (in m/s²)
v_f is the final velocity of the car (in m/s)
v_i is the initial velocity of the car (in m/s)
t is the time it takes for the car to accelerate (in seconds)
We know that the final velocity of the car is 62.0 mph, which is equal to 28.3 m/s. The initial velocity of the car is 0 m/s. We need to solve for the time it takes for the car to accelerate, so let t be represented by the variable x.
[tex]a = \dfrac{28.3 m/s - 0 m/s}{x}a = \dfrac{28.3 m/s}{x}[/tex]
We also know that the acceleration of the car is equal to the force exerted on the car divided by the mass of the car. The force exerted on the car is the power of the car, which is 5000 hp. The mass of the car is 1500 kg.
[tex]a = \dfrac{F}{m}\dfrac{28.3 m/s}{x} = \dfrac{5000 hp}{1500 kg}x = \dfrac{28.3 m/s \cdot 1500 kg}{5000 hp}x = 4.6 seconds[/tex]
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Why can't we see all types of waves in the electromagnetic spectrum?
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?
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]
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°
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.
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.
How does the capacitance of two identical capacitors connected in series compare to that of one of the capacitors?
Which theory argues that language shapes the way that we think?
Functionalist
Durkheimian
Whorfian
Freudian
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?
If a light bulb is connected to a 120 V outlet and the resistance of the bulb is 30 Ω, what is the current through the circuit?
3600 amps
150 amps
4 amps
0.25 amps
Using Ohm's Law (I = V/R), the current through a light bulb connected to a 120 V outlet with a resistance of 30 Ohms is calculated as 4 amps.
The current through a circuit with a light bulb connected to a 120 V outlet can be calculated using Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R).
Given that the resistance of the bulb is 30 Ohms (30), the current can be found using the formula I = V/R. Substituting the provided values, we get I = 120 V / 30 = 4 amps. Therefore, the current through the circuit is 4 amps.
To answer the initial question:
If a light bulb is connected to a 120 V outlet and the resistance of the bulb is 30 Ohms, the current through the circuit is 4 amps, not 3600 amps, 150 amps, or 0.25 amps.
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
When driving at night switch to low-beams whenever you come within ___ ft of an oncoming vehicle.
A. 300
B. 500
C. 200
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.
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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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.
which of the following astronomical bodies is the highest in hierarchy
earth
galaxy
solar system
star
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).