Answers350CR Integrated ScienceEnergy Transformations

Coulomb's Law Answers

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Charges of +2 µC and +3 µC are 4 mm from each other. Raina’s group draws four diagrams trying to represent the electrical force between the charges.Which diagram is correct?

Question illustration
A
W
B
X
C
Y
D
Z
2
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The table lists the values of the electrical force and the gravitational force between two protons.

Question illustration
A
The electrical force is 1.2 × 1036 times less than the gravitational force.
B
The electrical force is 1.2 × 1036 times greater than the gravitational force.
C
The electrical force is 8.0 × 10–37 times less than the gravitational force.
D
The electrical force is 8.0 × 10–37 times greater than the gravitational force.
3

The table lists the mass and charge of a proton and a neutron.How do the gravitational and electrical forces between a proton and a neutron compare?

Question illustration
A
The gravitational force is much smaller than the electrical force for any distance between the particles.
B
The gravitational force is much larger than the electrical force for any distance between the particles.
C
The gravitational force is much smaller than the electrical force for only very small distances between the particles.
D
The gravitational force is much larger than the electrical force for only very small distances between the particles.
4

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.

A
It will increase to six times the original force.
B
It will increase to thirty-six times the original force.
C
It will decrease to one-sixth the original force.
D
It will decrease to one-thirty-sixth the original force.
5

Both the electrical force and the gravitational force between two objects share which relationship?

A
They are directly proportional to mass.
B
They are inversely proportional to the square of the distance.
C
They are inversely proportional to charge.
D
They are directly proportional to the square of the distance.
6

Rolanda sees an error in her friend’s graphic organizer comparing electrical and gravitational forces.

Question illustration
A
The note about mass belongs in region Z, and the note about charge belongs in region X.
B
The note about mass belongs in region Y, and the note about infinite reach belongs in region Z.
C
The note about charge belongs in region Y.
D
The note about infinite reach belongs in region Y.
7

Which factors affect the electrical force between two objects?

A
mass and distance between them
B
charge and distance between them
C
mass and electric field strength
D
charge and mass
8

The table shows the charges and the distance between five different pairs of objects.If the force between two charges, q, separated by a distance, d, is F, what is the list of the other forces, from greatest to least?

Question illustration
A
Y, Z, W, X
B
Y, W, X, Z
C
Z, Y, W, X
D
Z, X, W, Y
9

What is the equation for calculating the electrical force, Fe, between two charges?

A
Fe = k
Option A
B
Fe =
Option B
C
Fe = k
Option C
D
Fe = k
Option D

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