# West Physics Semester 2 Review

## 74 terms

unit for force

### 3rd

newtons _________ law states for every action there is an equal and opposite reaction.

### 2nd

newtons __________ law explains the relationship between force, mass, and acceleration in the equation F=ma

### 1st

newtons ________law states an object in motion will stay in motion, an object at rest will stay at rest until an outside force acts on it

unit for power

### insulator

material that does not let heat or electrical current flow through it easily

### conductor

material that does allow heat or an electrical current flow through it easily

### electron

atoms become charged by gaining or loosing an (blank)

### current

electrical _______ is the flow of charged particles. (Fill in the blank.)

### charge

the law of conservation of (blank) states charges cannot be created or destroyed, only transferred

### circuit

a closed loop in which an electrical current can flow

### power

work done per unit time, or the rate in which electrical energy is converted to another form

### crest

the high point on a wave

### wave

a rhythmic disturbance that carries energy through space and matter

### amplitude

maximum displacement from a waves position of rest

### circuit

a closed loop through which electrons can flow

### hour

a kilowatt-___________ is a measure of energy consumption. Used by power companies to charge people for the energy they use. (Fill in the blank.)

### electromagnet

a temporary magnet created by running a current through a coil of wire.

### no air

Sound cannot travel through a _________.(Fill in the blank.)

### vibration

The source of all waves is a ____.(Fill in the blank.)

### period

The time it takes for a pendulum to swing back and forth once is called:

### energy

A wave carries___________.(Fill in the blank.)

### transverse

What type of wave also has movement at right angles to the direction of the wave?

### resonance

The result of vibrating an object at it own natural frequency.

### all waves

Which waves are capable of cancelling each other (undergoing interference)?

### pitch

The word that is equivalent to the frequency of a sound wave.

### compressions

The wavelength of a longitudinal wave is the distance between ________.(Fill in the blank.)

### Doppler effect

A perceived change in wave frequency because the wave source is moving is called:

### DC, AC

A battery produces ___ current and a generator produces ___ current.(Fill in the blanks.)

### series

In a _________ circuit one light bulb going out causes the rest to go out. (Fill in the blank.)

### nucleus, electrons

The ________ is the positive part of the atom and the _____ are the negative particles. (Fill in the blanks.)

### loose electrons

metals are good conductors because they have:

### friction

Rubbing a balloon with a wool cloth is an example of charging by :

### magnetic field

electrical current can be induced in a wire by placing it in a moving ____________(Fill in the blank.)

### generator

This device takes mechanical input (energy) and transforms it into electrical output (energy).

### batteries , generators

two kinds of electric pumps (voltage sources) are:

### thickness, length, temperature

The three things that affect the conductivity of a wire are:

### decreases

If the voltage in a circuit remains constant, while the resistance increases, what happens to the current? I= V/R

### it doubles

If the resistance in a circuit remains constant, while the voltage increases to double its former value, what happens to the current? I= V/R

### parallel

Your home electric wiring is a ___ circuit.

### series

A circuit breaker (or fuse) is wire in __________in your house. (Fill in the blank.)

### magnetic

A moving electric field creates a ___ field.(Fill in the blank.)

### refraction

Bending of light = _______.(Fill in the blank.)

### reflection

Angle in = angle out is the law of _______.(Fill in the blank.)

### U. V.

U.V. and infrared. Which has the shortest wavelength?

### purple

The color of visible light at the shortest wavelength.

### slower

The speed of light in glass compared to a vacuum is_______(slower or faster)

### red, green, blue

The three primary colors of light are:

### refraction

One side of a light wave slowing first when going into glass causes ___.

### converging

This kind of lens can be used to start fires. It is thickest in the middle and brings parallel rays of light together.

### absorbs

When light shines on a black object it _____it.

Which wave type in the Electromagnetic spectrum has the longest wavelength?

### gamma

Which wave type in the Electromagnetic spectrum has the highest frequency?

### gamma

Which wave type in the Electromagnetic spectrum has the highest energy?

A push or a pull

### gravity

a force that attracts all objects to each other

### law of Universal Gravitation

every object in the universe attracts every other object. The strength of the force and gravity is dependent on 2 factors: the masses of the objects and the distance between them

### mass

amount of matter in an object

### weight

the force of gravity on an object

### inertia

the tendency of an object to resist a change in motion

the release of nuclear radiation in the form of particles and waves from radioactive elements

### alpha particle

can be blocked by a piece of paper

### beta particle

can be blocked by aluminum

### isotope

same number of protons but a different number of neutrons

when the nucleus gives off particles or waves to become lighter and more stable.

### alpha decay

mass number decreases by 4, protons decrease by 2

### beta decay

mass number stays the same, proton number increases by 1

### half lives

period of time it takes for a radioactive element to decay

### nuclear fusion

two smaller nuclei join together to form a larger nucleus

### nuclear fusion

more energy than fission

### nuclear fusion

the sun is an example of this

### nuclear fission

a large nucleus is split into two smaller nuclei

### nuclear fission

the atomic bomb and nuclear power plants are examples of these

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