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# Physics

Irma Block

Lvl 10
2021-09-30 20:41:44
1.0
1 Review

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Cards in this guide (20)
What is a neutral atom

An atom with an equal number of protons and electrons.

Charges repel each other

____________ charges repel each other.

like

Like poles of magnets attract each other

false

When charging an object by conduction what happens to the charges in the object

Electrons move onto the object, giving it a static charge.

Apex ;)

Why does the frequency of a siren get higher as an ambulance using that siren gets closer

because you get closer to the sound

As the ambulance gets closer, the sound waves are compressed relative to the person; so the frequency increases.

In what kind of circuit is the voltage the same across all branches

The voltages are the same across the branches in a parallel circuit.

The strength of an electric field can be evaluated by looking at how close the fields lines are together

true

The pitch of a sound is determined by its and speed together or its frequency alone

The pitch of a sound can be determined by its frequency alone.

According to Coulombs Law how does distance affect the electric force

electric force can act at a distance bbut is stronger when object are closer

Increase the strength of a copper electromagnet

There are a couple of ways to increase the strength of a copper electromagnet. You could increase the current going through the wire or wrap more wire around it which increases the strength exponentially. You could also put in a soft iron core such as a nail which in essence becomes a magnet and increases the strength of the magnet.

The law of motion that states that an object will maintain its straight line motion until acted upon by an unbalanced force is

Newtons first Law

Electric fences are not connected to the ground in the circuit

An electric fence is connected to the ground only when an animal or a human being touches it to complete a circuit from the fence to the ground.

The wires of an electric fence are not connected directly to the ground because, if that was done, the fence would be shorted out and would not be able to do its job!

This is how an electric fence is actually hooked-up: the electric fence is connected to one side of a specially designed high voltage source and the return side of that source is connected to the ground.

Then, whenever the skin of any animal - or human - touches the wire whilst standing on the ground in bare feet, they get a high-voltage (10,000) DC electric pulse from the electric fence. The shocks are designed to be only enough to make them jump back from the fence, not to "electrocute" them so badly as to cause serious injury or death.

Magnetic fields store energy

true

A good way to de-magnetize something is to

heat it...

Electric fields lines show the way charges would move if they were in a field

positive

What are two kinds of fields that's make up an electromagnetic waves

Electric and Magnetic

What is the difference of proton an electrons

Protons are positive charged particles. Electrons are negative charged particles.

Where are you most likely to build up enough static charge to receive shock

On a nylon carpet in a dry area.

Electrons are blank charged particles

Negative

Why arent homes wired in series

If a home were wired in series, every light and appliance would have to be turned on in order for any light or appliance to work.

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