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What particles

make up a neutral atom?

Ans. Electrons (necessary), protons (necessary), neutrons (optional in hydrogen)

What is the charge of 100,000

electrons?Ans. 1.6 10-19 C

State one similarity

between the Law of Gravity and Coulomb’s

LawAns. Inverse-square laws

What is the electric force between two

protons located 10-10

m apart?

Ans. 2.3 10-8 N

What is the charge on ‘scope after these steps are taken:

•bringing + rod near

•grounding

•removing ground

•removing rod

Ans. negative

What type of material is shown on the right?

Ans. conductor

Dry paper, glass, &

pure water are _________(insulators/conductors)

Ans. insulators

What is the electric force between two 1 C charges located 1 m

apart?Ans. 9 109 N

What is the reason that microwave ovens can

transfer energy so easily to

water molecules?

Link to simulation

Ans. Water molecules resonate with the specific microwave f used in ovens

What is the method of

charging that occurs when

liquid leaves a hose very quickly

Ans. friction

What is the change in

force between two particles when charge

on both triples?

Ans. 9 x

What is the charge on ‘scope after:

•bringing + rod near

•grounding

•removing rod

•removing groundAns. neutral

What is the type of material shown to

the left?

Ans. insulator

Boys who were sent to get bags of gunpowder

on ships and bring them to the cannons were called powder

monkeys. What is the reason powder

monkeys wore no shoes?

Ans. Avoid building up charge

What is one way to ensure equal

amounts of charge on two

identical insulated

conductors?

Ans. Touch them together

What is the change in force

between two particles when charge on one triples and the

distance between them quadruples?

Ans. 3/(42) x

What is the type of

charge on the rod?Ans. negative

What is the reason that the

5,000,000,000,000,000,000,000 free-moving

electrons on a penny don't fly off due to

repulsionAns. Balanced by equal number of protons

What is the charge on + scope after touching it

with a neutral copper rod?

Ans. Grounds it out neutral

If the radius of the Earth were

reduced to ½ of its current size,

what would happen to your

weight?

Ans. 4 x

If your weight is 700 N, how

much gravitational force do you exert on the

Earth?

Ans. 700 N

Why did Newton

think that there was a force acting

on the Moon?

Ans. It was not moving in a straight line

What is the voltage between two plates if it takes 1000 J to

move 2 C between them?Ans. 500 V

What method of charging is

shown below?

Ans. conduction

A silk cloth rubs a glass rod. What

method is used to charge the rod?

Ans. friction

What is the name we give to the distortion of

the atoms in an insulator when an electric field is

present?

Ans. Charge polarization