Physics Final

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centripetal force on an object in circular motion is in the same direction as the ___________

centripetal acceleration

The net force directed toward the center of an objects circular path is________

centripetal force

fusion occurs when nuclei...

combine

a billiard ball collides with a stationary ball in an elastic collision the first ball ....

comes to a rest

crests correspond to

compression

An object moving with uniform circular motion will have a ________ tangential speed

constant

What is the force that provide centripetal force on a bicycle?

friction

perceived loudness of a sound is measured in

decibels

simple harmonic motion

describes any periodic motion that is the result of a restoring force that is proportional to displacement

Tides are caused by......

differences in the gravitational force between the earth and the moon

two mechanical waves can occupy the same space at the same time because waves are...

displacements of matter

When two billiard balls collide the collision is ________

elastic

In alpha decay the mass # of atom before decay is...

equal to the sum of the mass numbers of the products

number of cycles or vibrations per unit of time

frequency ( SI Unit is (Hz))

The degree to which an object attracts other objects is measured by the objects _________.

gravitational mass

simple longitudinal wave can be expressed as a ...

sine wave

motion of disturbance is...

wave

torque

a force that causes rotation around an axis

Radioactive materials have unstable ...

nuclei

audible sound waves

sound waves that average human can hear

ultrasonic waves

sound waves with frequencies above 20,000Hz ( can produce images )

infrasonic waves

sound waves with frequencies below 20hz

Examples of centripetal force

tension friction gravity

Why does an astronaut weigh less on the moon?

the gravitational field strength is less on Moon then Earth

when two people of different masses push off each other ....

their momenta are equal but opposite

The gravitational force when one of masses is doubled is ________

x4

The gravitational force when both of masses are doubled is ________

x6

The process of nuclear change in an atom of radioactive material is ...

Nuclear Decay

Centripetal acceleration

acceleration toward the center of a circle by an object moving along a circular path and at a constant speed. (change in direction)

in a two body collision momentum is _______

always conserved

the maximum displacement from the equilibrium is the...

amplitude (SI Units is (rad) and (m))

In an inelastic collision between two objects with un equal mass the momentum of one object is .....

increased by the amount that the momentum of the other is decreased

What causes passengers in a car to move when a car turns?

inertia

When a ball is whirled on a string and the string breaks, what causes the ball to move off in a straight line?

inertia

Doppler effect

is an observed change in frequency when there is relative motion between the source of waves and an observer

Sound waves are...

longitudinal

At maximum displacement

mass acceleration is maximum and speed is zero

At equilibrium ...

mass acceleration is zero and speed is maximum

fission chain reaction slowed by...

materials that will absorb some of the neutrons

waves that require a medium through which to travel are...

mechanical waves

physical environment through which a disturbance can travel is...

medium

speed of sound depends on the...

medium and temperature of medium

the impulse experienced by a body is equivalent to the body's change in ___________

momentum

Tangential acceleration

object in circular motion and an acceleration of an object due to CHANGE IN SPEED.

tangential speed

object in circular motion is the objects speed along an imaginary line drawn tangent to the circular path.

When two objects stick together and move with a common velocity after colliding the collision is__________

perfectly inelastic

time it takes a complete cycle to occur

period ( SI Unit is (s))

Rays

radial lines perpendicular to the wave fronts

troughs correspond to

rarefactions

waves arriving at a fixed boundary are ...

reflected and inverted

compression

region of longitudinal wave where density and pressure are maximum

rarefaction

region of longitudinal wave where density and pressure are minimum

When a nucleus undergoes nuclear decay by gamma rays, the atomic # of the element...

remains the same

half life

time required for half a sample of radioactive nuclei to decay

law of conservation of momentum

total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the ovjects

elastic collision

two objects collide and return to their original form with no change in kinetic energy

transverse wave

wave whose particles vibrate perpendicularly to direction of wave motion

resonance

when the frequency of of a force applied to a system matches the natural frequency of vibration of the system resulting in large amplitude of vibration


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