1 point
An engineer built a device out of a bicycle. When he pedals the bicycle it
causes a magnet to spin in a coil of wire and lights a lightbulb. What type of
device did he build?*
1.Generator
2.Motor
3.Electromagnet
What do waves transfer from place to place?
a) motion
b) energy
c) matter
d) water
Answer:
motion transfer from place to place
A popular and dangerous circus act is the human cannonball, in which a person is shot from a cannon. Suppose the cannon has a barrel that is 3.05 m long and 16700 J of work done to accelerate the acrobat. What is the force exerted by the cannon on the acrobat?
The force of about 5.47 kN will be exerted on the acrobat by the cannon.
Explanation:
If work is done on the system which is acrobat for the present case, then the ratio of work done to the distance of the contact force medium can give us the force exerted on the acrobat or system.
As here the cannon is the source of force and it has a barrel of 3.05 m that means the cannon ball should travel the distance of 3.05 m to reach the acrobat and it has done a work of about 16700 J to accelerate the cannon ball. So as per Newton's third law of motion, the force gained by the cannon ball due to the work done on it will be equal to the force exerted on the acrobat by the cannon.
Thus, as work done is the product of force with displacement. Here the force experienced by the cannon ball will be the ratio of work done to the distance covered by the cannon ball.
[tex]Force = \frac{Work done }{Distance} = \frac{16700}{3.05} = 5,475 N.[/tex]
So, the force experienced by the cannon ball is 5.47 kN and the same force will be exerted on the acrobat.
Thus, the force of about 5.47 kN will be exerted on the acrobat by the cannon.
Final answer:
To find the force exerted by the cannon on the acrobat, use the formula Work = Force × Distance. Substitute the given values and calculate the force to be 5475.41 Newtons.
Explanation:
Force exerted by the cannon on the acrobat:
To calculate the force exerted by the cannon on the acrobat, we use the formula Work = Force × Distance. Given that 16700 J of work is done to accelerate the acrobat over a distance of 3.05 m, we can find the force by dividing the work by the distance: Force = Work / Distance.
Substitute the values:
Work = 16700 JDistance = 3.05 mCalculate the force:
Force = 16700 J / 3.05 m = 5475.41 N
Therefore, the force exerted by the cannon on the acrobat is 5475.41 Newtons.
A child squeezes a pillow over his ears during a thunderstorm. Which wave
interaction helps decrease the sound of the thunder?
A. Reflection
B. Destructive interference
C.Constructiveinterference
D. Absorption
The mass of Venus is____times that of the Earth.
3/4
0.82
1.12
0.68
(pls help ASAP!)
Answer:
0.82
Explanation:
Random thing I just happened to remember
Answer:
0.82
Explanation:
Whereas Earth has a mean radius of 6,371 km and a mass 5,972,370,000 quadrillion kg, Venus has a mean radius of about 6,052 km and a mass of 4,867,500,000 quadrillion kg. This means that Venus is roughly 0.9499 the size of Earth and 0.815 as massive.
Suppose you wanted to produce a sound wave with a wavelength of 1m
in room temperature air. What would its frequency be? *
Answer:
340 Hz
Explanation:
The frequency of a wave is the number of oscillations completed by the wave per second.
For a wave, the relationship between wavelength of the wave and its frequency is given by the wave equation:
[tex]v=f\lambda[/tex]
where
v is the speed of the wave
f is its frequency
[tex]\lambda[/tex] is its wavelength
In this problem, we have a sound wave, with wavelength of
[tex]\lambda=1m[/tex]
The speed of sound waves at room temperature is
[tex]v=340 m/s[/tex]
Therefore, using the previous equation, we can find the frequency of the wave:
[tex]f=\frac{v}{\lambda}=\frac{340}{1}=340 Hz[/tex]
The frequency of the sound wave with a wavelength of 1 meter in room temperature air would be approximately 343 hertz (Hz).
To find the frequency of a sound wave when given its wavelength, we can use the formula for the speed of sound in a medium, which is given by:
[tex]\[ v = f \times \lambda \][/tex]
where [tex]\( v \)[/tex] is the speed of sound in the medium, [tex]\( f \)[/tex] is the frequency of the sound wave, and[tex]\( \lambda \)[/tex] is the wavelength of the sound wave.
We know that the speed of sound in room temperature air (which is approximately 20°C or 68°F) is about 343 meters per second (m/s). The wavelength [tex]\( \lambda \)[/tex] given in the question is 1 meter.
Rearranging the formula to solve for frequency[tex]\( f \)[/tex], we get:
[tex]\[ f = \frac{v}{\lambda} \][/tex]
Substituting the known values into the equation:
[tex]\[ f = \frac{343 \text{ m/s}}{1 \text{ m}} \] \[ f = 343 \text{ Hz} \][/tex]
Therefore, the frequency of the sound wave with a wavelength of 1 meter in room temperature air is 343 Hz. This frequency corresponds to a pitch that is slightly higher than the B4 note on a musical scale, which is close to the upper limit of what most people can comfortably hear.
Sound is a form of ____ which produces a sensation of hearing in our ears
Sound waves are ______waves.
Answer:
energy and electromagnetic
Explanation:
In one town, there are several natural gas drilling sites. Scientists warn town officials that the health of the people could be affected by the natural gas wells, so in an effort to protect its citizens, the town temporarily prevents builders from developing homes and businesses within two miles of the drill sites.
This example demonstrates how science can be used to inform decision making at the ______ level.
A.
international
B.
national
C.
community
D.
state
Answer:
C. community
Explanation:
Community consists of a local residence, like a town.
Answer:
C - Community (if wrong try D )
Explanation:
I would go with c because national addresses the whole and State addresses that whole state that only the town has that problem Usa while C while only address the town since the problem is only affecting one town
Sort the following according to how fast sound will travel through the medium from slowest to fastest: liquid, solid, gas *
4 points
liquid, solid, gas
gas, solid, liquid
solid, liquid, gas
gas, liquid, solid
Which is a property of ionic compounds?
O soft and brittle
O low boiling point
O able to conduct electricity
o low melting point
Answer: able to conduct electricity
Explanation: refer to pic
Tom left for his friend's house. He drove 60 km in an hour. When he got to John's house, he wondered how fast he had been driving. What formula would he use to determine his speed?
Answer: Tom drove 60 km/hr fast
Speed = Distance traveled / time taken
Explanation:
Given that:
Distance traveled by Tom = 60 km
Time taken by Tom = 1 hour
Speed = ?
Since speed is obtained by dividing distance traveled by the time taken, hence the formula to use is as follows:
speed = distance / time
Speed = 60 km / 1 hour
Speed = 60 km/hr
Thus, Tom had been driving 60 km/hr fast, using the formula "speed = distance / time"
Social loafing is most likely to occur _____.
when no one wants to volunteer to help
when no single person in a group is being watched
during a team sporting event
when people realize they must work alone
Answer:
Answer is when no single person in a group is being watched.
Refer below.
Explanation:
Social loafing is most likely to occur:
when no single person in a group is being watched.
Social loafing is most likely to occur when people realize they must work alone.
Thus, Social media refers to methods of communication where individuals produce, share, and/or exchange knowledge and concepts in online groups and networks.
For schools, departments, and offices wishing to establish or maintain an existing social media presence, we provide a variety of tools, including individualized consultations where we review social media goals and strategy and provide insights and ideas.
You must fill out the Account Request Form before opening any social media accounts. If your school has any rules or branding requirements, be sure to ask the communications office about them.
Thus, Social loafing is most likely to occur when people realize they must work alone.
Learn more about Social media, refer to the link:
https://brainly.com/question/30194441
#SPJ6
A car travelling at 40 m/s comes to a halt in 8 seconds. What is the car’s acceleration and how far does it travel while it is stopping?
Answer: Acceleration = 5m/s^2; Distance traveled = 320 m
Explanation:
Velocity of car = 40m/s
Time taken = 8 seconds
Acceleration = ?
Distance traveled = ?
A) Since acceleration is the rate of change of velocity per unit time
i.e acceleration = velocity / time
acceleration = 40m/s / 8 seconds
Acceleration = 5m/s^2
B) To get how far the car traveled before stopping, obtain the distance from the formula:
velocity = distance traveled / time
40m/s = distance / 8 seconds
Distance = 40m/s x 8 seconds
Distance = 320 m
Thus, the car’s acceleration is 5m/s^2 while it traveled 320 metres before stopping.
Final answer:
Acceleration and distance traveled during car's stoppage are -5 m/s² and -160 meters respectively.
Explanation:
Acceleration: To find the car's acceleration, we use the formula: acceleration = (final velocity - initial velocity) / time taken. Substituting the values, we get acceleration = (0 - 40 m/s) / 8 s = -5 m/s².
Distance Traveled: To calculate the distance the car travels while stopping, we use the equation: distance = initial velocity * time + 0.5 * acceleration * time^2. Substituting the values, the car travels a distance of -160 meters while stopping.
A diver steps off a diving platform. How fast will she be moving when she
reaches the water 10.0 m below?
A. 7.00 m/s
B. 9.90 m/s
c. 14.0 m/s
D. 196 m/s
Answer:
C. 14.0 m/s
Explanation:
[tex]v_0=0\\a=g=9.9.8\\h=10\\v_f=?[/tex]
[tex]v_f^2=v_0^2+2a \Delta h\\v_f=\sqrt{v_0^2+2a \Delta h}\\v_f=\sqrt{0+2(9.8)(10)}\\v_f=\sqrt{196}\\v_f=14[/tex]
Identify the characteristics of protists. Check all that apply.
Answer:
There are no examples
Explanation:
Answer:
these are the examples, then , u have to pick which ones are animal-like protists.
stationary
able to move using specialized structures
typically autotrophs
unicellular
Explanation:
a supertanker traveling at 7.2 m/s (about 12 mph) decelerates to a halt in 12 min. Calculate the magnitude of its average deceleration in meters per second squared.
Answer: 0.01 m/s2
Explanation:
Given that:
Velocity of supertanker = 7.2 m/s (about 12 mph)
Time taken = 12 min
(Since the SI unit of time is seconds, convert 12 minutes to seconds
1 minute = 60 seconds
12 minutes = 12 x 60 = 720 seconds)
Average deceleration = ?
Recall that deceleration is obtained by dividing velocity by time taken.
i.e Deceleration = velocity / time
Deceleration = 7.2 m/s / 720 seconds
= 0.01 m/s2
Thus, the magnitude of its average deceleration is 0.01 meters per second squared.
what are three processes in the body that are fueled by chemical potential energy?
Which 3 components must be used in order for a light bulb to light?
a. Battery
b. Fuse
c. Light Bulb
d. Switch
e. Wire
Answer:
a,e,d
Explanation:
i got it right when i was doing study island
I this example: Convection, Radiation, or Conduction
The kitchen gets warm when someone uses the oven.
Convection
becuse thats what the oven uses
Answer: Radiation
Explanation:
Radiation is like for example the sun gives out the radiation from it's heat and for the example you have the heat from the stove is warming the house up from it's radiation waves.
1. If you push a 40.0kg mass object with a force of 145.ON, what will be the object's
acceleration?
Newton said . . . F = m a
Divide each side by m . . . a = F / m
Acceleration = (force) / (mass)
Acceleration = (145.O N) / (40.0 kg)
Acceleration = 3.625 m/s²
Barbara places an object in front of a mirror. The mirror produces an image that is inverted, real, and smaller than the object.
Which kind(s) of mirror could Barbara be using?
convex, because concave and plane mirrors produce only virtual images
concave, because plane and convex mirrors produce only upright virtual images
concave or convex, because both types of mirrors produce images that are inverted and real
convex or plane, because both types of mirrors produce an image that is smaller than the object
Answer:
B
Explanation:
edg
A crowd in a stadium is heard by a man standing 823.2 m away. The man hears the noise
2.5 seconds after the noise occurs. How fast was the sound traveling?
What’s the answer?
Answer: 329.28 m/s
Explanation:
Given that:
Distance of sound = 823.2 m
Time taken for sound = 2.5 seconds
The speed of traveling sound = ?
Speed is obtained by dividing the distance travelled by the time taken for the travel.
Speed = Distance / time
Speed = 823.2m/2.5 seconds
Speed = 329.28 m/s
Thus, the sound traveling as fast as 329.28 m/s
In the diagram below, the planets' relative distances from the Sun are shown. The sizes of the planets are not drawn to scale.
Jupiter
Uranus
Mercury Earth
Sun
Venus Mars
0
Saturn
Neptune
Which of the following planets most likely has the coldest surface temperature?
A. Venus
B. Mars
C.
Saturn
D. Mercury
Final answer:
Saturn, being one of the outer planets far from the Sun, has much colder surface temperatures compared to the inner planets like Venus, Mars, and Mercury, making it the most likely to have the coldest surface temperature among the options provided.
Explanation:
The planet most likely to have the coldest surface temperature among the options provided (Venus, Mars, Saturn, Mercury) is Saturn. Surface temperatures on planets decrease with increasing distance from the Sun because the planets are heated by the Sun's radiant energy, which diminishes with the square of the distance. Saturn, being far from the Sun, has much colder temperatures compared to the inner planets.
Furthermore, planets like Jupiter, Saturn, Uranus, and Neptune are giant gas planets with substantial distances from the Sun, leading to much lower surface temperatures. Given Saturn's greater distance from the Sun compared to Venus, Mars, and Mercury, it is the planet most likely to have the coldest surface temperature among the options.
Based on the given options, Mars is the planet most likely to have the coldest surface temperature.
To determine which planet most likely has the coldest surface temperature based on the given diagram and options provided, we can consider the distance of each planet from the Sun and its effect on surface temperature:
1. **Mercury**: Being closest to the Sun does not necessarily mean it has the hottest surface temperature. Despite its proximity, Mercury has extreme temperature variations due to its lack of atmosphere to retain heat.
2. **Venus**: While Venus is closer to the Sun than Earth, it has a thick atmosphere that traps heat, resulting in a very high surface temperature making it one of the hottest planets in our solar system.
3. **Mars**: Mars is farther from the Sun than Earth and has a thin atmosphere, which leads to colder surface temperatures compared to Venus and Earth. It experiences colder conditions due to its distance and atmospheric composition.
4. **Saturn**: Saturn is a gas giant planet, and its distance from the Sun results in very cold temperatures in its upper atmosphere. However, the question specifically asks about the surface temperature, and gas giants like Saturn do not have a solid surface to measure a surface temperature.
Based on the given options, **Mars** is the planet most likely to have the coldest surface temperature. It is farther from the Sun than Venus and has conditions more conducive to lower temperatures compared to the other listed planets.
The standard wave format for any wave is
a a transverse
b a longitudinal
c an electromagnetic
wave. When depicting
a a transverse
b a longitudinal
c an electromagnetic
wave in standard wave
format, the direction of motion must be rotated by 90 degrees. Only one of two waves is shown at a time when placing
a a transverse
b a longitudinal
c an electromagnetic
wave in standard wave format
The standard wave format for any wave is transverse wave. When depicting longitudinal wave in standard wave format, the direction of motion must be rotated by 90 degrees. Only one of two waves is shown at a time when placing an electromagnetic wave in standard wave format.
Answer:
Transverse wave and Longitudinal wave and Electromagnetic wave
Explanation:
Ingrid is moving a box from the ground into the back of a truck. She uses 20 N of force to move the box 5 meters. If she uses an inclined plane to reduce her force to 10 N which of the following statements will be true?
A. She will decrease the amount of work done.
B. She will make her work efficiency 100 percent.
C. She will increase the distance the box moves.
D. All of the above.
I think the right answer is of option A.
Explanation:
Inclined plane multiplies the applied effort.So,the force applied become less.
Hope it will help u...:)
MATHPHYS PLEASE HELP IT SAYS ITS WRONG
Answer:
0.833 J
Explanation:
The initial kinetic energy of the spike is:
KE = ½ mv²
KE = ½ (0.52 kg) (3.7 m/s)²
KE = 3.56 J
23.4% of this energy is converted to internal energy.
U = 0.234 (3.56 J)
U = 0.833 J
When waves travel through water, why do the moving water particles continue to return to their starting position?
A. Waves transfer matter, but not energy.
B. Waves transfer both matter and energy.
C. Waves transfer energy, but not matter.
D. Waves don't transfer matter or energy.
Answer:
B
Explanation:
As the wave continues down its path, it picks up energy from the water and wind if it is blowing relative to its direction.
Match each form of energy with its description.
Answer:
Fruit hanging is gravitational potential ( not moving making it potential and in the air so gravitational)
A box moving is kinetic (moving in the direction of the force mean kinetic)
The sand feeling warm is thermal (thermal means heat)
The lightning is electrical (self explanatory)
Radio waves is the last one I can’t see what it say
Click on the image. A science student wants to make an electromagnet using a copper wire wrapped around an iron bar, as shown in the image. What should the student do next?
- a. Connect the wire to a bulb
- b. Heat the wire around the bar
- c. Send a current through the wire
- d. Touch the ends of the wire together
The student will send a current through the wire after the wrapping of the copper wire. Option A is correct.
What is electromagnet?An electromagnet is a magnet whose magnetic field is generated by an electric current. Wire coiled into a coil is used to make electromagnets.
A current flowing through the wire produces a magnetic field that is focused in the hole, which serves as the coil's co
The Student wants to make an electromagnet using a copper wire wrapped around an iron bar. The student will send a current through the wire after the wrapping of the copper wire.
Hence option A is correct.
To learn more about the electromagnets refers to the link:
https://brainly.com/question/13803241
How is lightning formed with explanation l?