Semester 2 Review

According to Newton's Universal Law of Gravitation , why does force increases a lot when distance decreases a small amount?

• Force is inversely related to the distance to the power of 2. 

• Force and distance have direct relationship.

• When distance increases, the force will be affect less. 

• Because for is only related to the mass when distance is big. 

How is the electrostatic force different from the force of gravity?

• The force of gravity is always stronger than electrostatic force.

• The electrostatic force is always stronger than the force of gravity.

• The force of gravity only pulls while the electrostatic force can both push and pull.

• The electrostatic force is not affected by gravity.

How do you make your electromagnet stronger? Check all that applies.

• Wrap more coils around the nail.

• Shake the battery faster.

• Use a longer nail

• Wrap the coils around the battery.

How do you make the lightbulb light up brighter on the shake electricity generator? Check all that applies.

• Shake the generator faster.

• Add more coils around the tube.

• Add more batteries

• Add stronger magnet

When electricity is generated, what is moving through the coil?

• Electrons

• Protons

• Neutrons

• Nucleus

How do magnets generate electricity?

• Electricity flows in magnets.

• Movements of magnets induce electrons in the coils to move to generate electricity.

• The kinetic energy in magnets are transferred to the coils to generate electricity.

• The potential energy in the magnets is transformed into heat, and heat generates electricity.

What is the upside of levitating transportation?

• You get to use less fossil fuel because electricity does not use fossil fuels.

• You can run the transportation by using permanent magnets.

• Less energy is wasted due to reduced friction.

• You do not need to walk to reach your destination.

Which part of an atom is positived charged, found in nucleus, and element identifier?

• Proton

• Electron

• Neutron

• Pretron

Which subatomic particles differentiate the charge of an atom?

• Proton and Neutron

• Proton and Electron

• Electron and Neutron

• Atomic mass and Neutron

What does the picture tell us about Carbon?

• Number of electrons in the atom

• Number of elctrons in the outer most shell

• Number of proton

• Number of electrons that will consume other atoms