A student claims that the gravitational force between two objects depends upon the mass of the objects and the distance between them. Which argument best supports the student's claim?
Responses
If the distance between two objects decreases, the gravitational force between the objects will not change
If the distance between two objects decreases, the gravitational force between the objects will not change
If the distance between two objects increases, the gravitational force between the objects will decrease.
If the distance between two objects increases, the gravitational force between the objects will decrease.
If the distance between two objects decreases, the gravitational force between the objects will disappear.
If the distance between two objects decreases, the gravitational force between the objects will disappear.
If the distance between two objects increases, the gravitational force between the objects will increase.
If the distance between two objects increases, the gravitational force between the objects will decrease.
A student makes the claim that the space around a charged particle will exert a force on any other charged particle that is placed within this space. If an object is placed between two charged metal plates, one plate that is positively charged and one plate that is negatively charged, which argument BEST supports the student's claim?
Responses
An object with a negative charge will remain stationary between the plates.
An object with a negative charge will remain stationary between the plates.
A neutrally-charged object will move toward the negative plate.
A neutrally-charged object will move toward the negative plate.
A neutrally-charged object will move toward the positive plate.
A neutrally-charged object will move toward the positive plate.
An object with a positive charge will move toward the negative plate.
A neutrally-charged object will move toward the positive plate.
Which drawing below represents the electric field surrounding two objects that have EQUAL magnitude charges of the SAME polarity?
Responses
Unfortunately, as an AI language model, I cannot produce images, but I can describe them.
The correct answer would be two diagrams that show electric field lines that emanate from both charged objects and that are evenly spaced and parallel. Therefore, the correct option would be two diagrams that are identical to each other.
The image shows a large bar magnet with the poles labeled.
How would the poles of the magnet change if it were divided into four equal parts?
Responses
Unfortunately, as an AI language model, I cannot provide any image. However, I can describe how the poles would change if the magnet is divided into four equal parts.
If the magnet were divided into four equal parts, each part would have its own north and south pole. The original north pole of the magnet would become two north poles, and the original south pole would also become two south poles. Therefore, the magnet would have four poles instead of two, with each smaller section having its own pair of north and south poles.
Maricela and Joaquim are standing on the floor very close to each other. They are not touching. Which of the following statements is true about the forces that are present?
Responses
There is a large gravitational attraction between the two students.
There is a large gravitational attraction between the two students.
There is a small gravitational attraction between the two students.
There is a small gravitational attraction between the two students.
The is a large gravitational repulsion between the two students.
The is a large gravitational repulsion between the two students.
There is a small gravitational repulsion between the two students.
There is a small gravitational repulsion between the two students.
There is a small gravitational attraction between the two students.
When combing one's hair, the comb becomes positively charged. What happens to the hair being combed?
Responses
It becomes negatively charged.
It becomes negatively charged.
It loses electrons.
It loses electrons.
It becomes positively charged.
It becomes positively charged.
It stays uncharged.
The hair being combed becomes negatively charged.
A student is investigating what happens when a neutral metal sphere sitting on an insulated stand is touched by a negatively charged rod. The set up for the student's investigation is shown in the diagram.
image 3845826dd9f243109fa16213cd34e0d4
What will happen to the excess electrons when the negatively charged rod touches the metal sphere?
Responses
The excess electrons will move from the sphere to the rod and spread out along the rod.
The excess electrons will move from the sphere to the rod and spread out along the rod.
The excess electrons will move from the sphere to the rod and stay clustered near the end of the rod that touches the sphere.
The excess electrons will move from the sphere to the rod and stay clustered near the end of the rod that touches the sphere.
The excess electrons will move from the rod to the sphere and spread out on the sphere.
The excess electrons will move from the rod to the sphere and spread out on the sphere.
The excess electrons will move from the rod to the sphere and stay clustered in the area where the rod touches the sphere.
The excess electrons will move from the rod to the sphere and stay clustered in the area where the rod touches the sphere.
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The excess electrons will move from the rod to the sphere and spread out on the sphere.
A student is designing an investigation of the distribution of charges in conductors. She will use two conducting spheres mounted on insulating stands in the investigation. The conducting spheres are shown.
image 20dd73ed8cf143748d14ec76f16d7970
The student wants to separate the charges of the spheres as shown.
image 6e01081a67464a9cb75abfdb169f19b8
What should the student do in her investigation to produce these results?
Responses
She should place two negatively charged rods near each sphere.
She should place two negatively charged rods near each sphere.
She should place two positively charged rods near each sphere.
She should place two positively charged rods near each sphere.
She should place a positively charged rod near the left sphere.
She should place a positively charged rod near the left sphere.
She should place a negatively charged rod near the left sphere.
She should place a positively charged rod near the left sphere.
Seamus made an electromagnet from an iron nail, a piece of copper wire with three coils spread out across the nail, and a AAA-sized battery. His magnet attracts only one paper clip, and he wants to boost the power of his magnet to attract at least four paper clips. What two things can Seamus do to accomplish his goal?
Responses
Seamus can add batteries to increase the voltage, and he can increase the space between the wire coils.
Seamus can add batteries to increase the voltage, and he can increase the space between the wire coils.
Seamus can add batteries to decrease the voltage, and he can increase the space between the wire coils.
Seamus can add batteries to decrease the voltage, and he can increase the space between the wire coils.
Seamus can add batteries to increase the voltage, and he can decrease the space between the wire coils.
Seamus can add batteries to increase the voltage, and he can decrease the space between the wire coils.
Seamus can add batteries to decrease the voltage, and he can decrease the space between the wire coils.
Seamus can add batteries to decrease the voltage, and he can decrease the space between the wire coils.
Seamus can add batteries to increase the voltage, and he can decrease the space between the wire coils.
A student wishes to make the magnetic force exerted by the electromagnet shown below greater.
image e0200808b8fa436fae6f573f2546fa05
Which procedure step could the student follow to accomplish this goal?
Responses
increase the length of wire at location 1
increase the length of wire at location 1
add more batteries in series at location 3
add more batteries in series at location 3
reduce the number of wire turns at location 4
reduce the number of wire turns at location 4
open the switch at location 2
Add more batteries in series at location 3.
Brian made an electromagnet in his science class. He spread out several paper clips, all made of the same material and the same size, on a lab table. Holding his electromagnet in a fixed spot, he tried to attract as many paper clips as possible. He observed that there were two paper clips that were not attracted to his electromagnet.
What is the MOST LIKELY conclusion Brian can draw about his observation?
Responses
The two paper clips were repelled by the electromagnet and not picked up.
The two paper clips were repelled by the electromagnet and not picked up.
The two paper clips did not have magnetic properties like the others.
The two paper clips did not have magnetic properties like the others.
The two paper clips were outside the magnet's electromagnetic field.
The two paper clips were outside the magnet's electromagnetic field.
The two paper clips were not light enough to be pulled by the magnet.
The two paper clips did not have magnetic properties like the others.
The picture shows an electromagnet and two paper clips that are the same size and are made of the same materials.
Which is the most likely reason that Paper clip Y does not move toward the magnet?
Responses
Paper clip Y is being repelled by the electromagnet.
Paper clip Y is being repelled by the electromagnet.
Paper clip Y is outside of the magnetic field produced by the nail.
Paper clip Y is outside of the magnetic field produced by the nail.
Paper clip Y is not light enough to be pulled by the electromagnet.
Paper clip Y is not light enough to be pulled by the electromagnet.
Paper clip Y is not magnetic like Paper clip Z.
Paper clip Y is not magnetic like Paper clip Z.
The table below shows the farthest distance that magnets M, N, O, P can reach to pull a paper clip toward them.
Magnet Farthest Distance
Reached (cm)
M 4
N 8
O 3
P 6
Which magnet has the greatest magnetic force?
Responses
N
N
P
P
M
M
O
N
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What must an object gain or lose to become electrically charged?
Responses
neutrons
neutrons
protons
protons
electrons
electrons
nucleus
Electrons.
A student is investigating the distribution of charge in a conductor. He attaches two unopened soda cans on their sides to two foam cups with tape. He sets the soda cans with the cups onto a tabletop so that they are touching one another. Then he moves a negatively charged balloon close to the left soda can. The set up for the investigation is shown.
How do the electrons move in the soda cans?
Responses
They move from the right can to the left can.
They move from the right can to the left can.
They move to the top of both cans.
They move to the top of both cans.
They move to the bottom in both cans.
They move to the bottom in both cans.
They move from the left can to the right can.
They move from the left can to the right can.
They move from the right can to the left can.
Robin has an iron rod around which she wraps copper wire. She places the device on a table near a compass. What will happen to the compass if she sends current through the copper wire?
Responses
The needle of the compass will show no effect.
The needle of the compass will show no effect.
The needle of the compass will point at a right angle to the device.
The needle of the compass will point at a right angle to the device.
The needle of the compass will point toward the device.
The needle of the compass will point toward the device.
The needle of the compass will spin in circles.
The needle of the compass will point at a right angle to the device.
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If two charges are attracted to each other, then which of the following is true?
Responses
Both charges must be different.
Both charges must be different.
Both charges must be positive.
Both charges must be positive.
Both charges must be negative.
Both charges must be negative.
Both charges must be equal in value.
Both charges must be different.
A student claims that the gravitational force between two objects depends on the mass of the objects and the distance between them. Which argument best supports the student's claim?
Responses
If Earth were much bigger, the gravitational force between Earth and the Moon would not change.
If Earth were much bigger, the gravitational force between Earth and the Moon would not change.
If Earth were much bigger, the gravitational force between Earth and the Moon would be lower.
If Earth were much bigger, the gravitational force between Earth and the Moon would be lower.
If Earth were much bigger, the gravitational force between Earth and the Moon would disappear.
If Earth were much bigger, the gravitational force between Earth and the Moon would disappear.
If Earth were much bigger, the gravitational force between Earth and the Moon would be higher.
If Earth were much bigger, the gravitational force between Earth and the Moon would be higher.
If Earth were much bigger, the gravitational force between Earth and the Moon would be higher.
Danielle took an iron nail and wrapped thin copper wire around it, then connected the ends of the copper wire to a battery. Which force or forces can Danielle's device produce?
Responses
only a gravitational force
only a gravitational force
both electrical and magnetic forces
both electrical and magnetic forces
both magnetic and gravitational forces
both magnetic and gravitational forces
only an electrical force
only an electrical force
Both electrical and magnetic forces.
A student rubs a rubber rod with fur, producing a negative charge on the rod. The student then touches the rod to a hollow, neutral metal sphere that stands on an insulating plastic stand. This transfers negative charges from the rod to the sphere:
image 63f9196b581c4f17bbe56cfd6ddd781f
Which statement best predicts what will happen to the charge, and why?
Responses
It will remain at the point of contact between the rod and the sphere, because resistance in the metal prevents the charges from easily moving.
It will remain at the point of contact between the rod and the sphere, because resistance in the metal prevents the charges from easily moving.
It will quickly spread to the air around the sphere, because it will seek to occupy as large a volume of neutral matter as possible.
It will quickly spread to the air around the sphere, because it will seek to occupy as large a volume of neutral matter as possible.
It will distribute itself evenly over the surface of the sphere, because like charges repel and the sphere is a conductor.
It will distribute itself evenly over the surface of the sphere, because like charges repel and the sphere is a conductor.
It will slowly drift to the bottom of the sphere because the charges rapidly attach to individual atoms, making them slightly heavier than surrounding atoms.