Section 1

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tangental speed

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Last updated

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Date created

Mar 1, 2020

Cards (80)

Section 1

(50 cards)

tangental speed

Front

The speed of an object in circular motion

Back

Longitudinal waves

Front

A wave vibrating in the direction of propagation.sound travels in longitudinal waves

Back

Doppler Effect

Front

effect is the perceived change in frequemcy of sound due to the relative motion of the source and or the listener

Back

Supersonic

Front

Motion that moves faster than the speed of sound in air

Back

Reflection

Front

Back

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a point 3 times as far from the center of the asteroid, the force will be

Front

40 n

Back

Power

Front

rate at which work is done (work/time)

Back

if you double the frequency of a vibrating object, its period

Front

halves

Back

Momentum

Front

"Mass in motion" (mass x velocity)

Back

Diffraction

Front

describes how waves bend, or change direction, as they travel around the edges of obstacles.

Back

Pitch

Front

The sensation of a frequency. Higher pitch sound corresponds to a higher frequency sound wave and a low pitch sound corresponds to a low frequency sound wave.

Back

Compression (Longitudinal waves)

Front

a region in a longitudinal wave where the particles are closest together

Back

Refraction

Front

change in the direction of waves as they pass from one medium to another. Refraction, or bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves. So if the media (or its properties) are changed, the speed of the wave is changed. (occurs in water)

Back

Work

Front

When a force acts upon an object to cause a displacement of the object (F x d x cos)

Back

centripetal acceleration

Front

Acceleration of an object in circular motion that is directed towards the center of the centripetal path. There is a change in directionality, but no change in speed.`

Back

Weight

Front

The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.

Back

Potential Energy

Front

the stored energy of position possessed by an object

Back

Reverberation

Front

produced when the original and the reflected sound wave combine as one very prolonged sound wave

Back

Kinetic Energy

Front

the energy of motion.

Back

Velocity

Front

vector quantity that refers to "the rate at which an object changes its position"

Back

tangental acceleration

Front

Acceleration of an object in circular motion that is directed towards the center of the centripetal path. There is a change in both directionality and tangential speed.

Back

Sound Loudness

Front

Sound loudness is a subjective term describing the strength of the ear's perception of a sound.

Back

Sound

Front

a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water

Back

Frequency

Front

how often the particles of the medium vibrate when a wave passes through the medium.

Back

An opera singer's voice is able to break a thin crystal glass if the singers voice and the glass have the same natural

Front

frequency

Back

Medium

Front

A substance that makes possible the transfer of energy from one location to another, especially through waves.

Back

the two forces that control gravitational force are

Front

mass and radius

Back

What direction is centripetal acceleration directed?

Front

inward

Back

node

Front

a point at which you can touch a standing wave on a rope without disturbing the wave

Back

a tin can whirled on the end of a string and moves in a circle because

Front

there is an inward force acting on the can

Back

momentum is a ..... quantity

Front

vector

Back

Echo

Front

perception of the reflected sound wave.It is observed when the original sound had to travel more than 17m so the original and reflected sounds do not interact at our ear

Back

Sound Intensity

Front

Sound intensity is defined as the sound power per unit area. The usual context is the measurement of sound intensity in the air at a listener's location.

Back

when a sound wave moves toward you the waves speed

Front

stays the same

Back

Mass

Front

The mass of an object is a fundamental property of the object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object.

Back

When the distance between two planets decreases by half, the force between them

Front

increases to four times as much

Back

Force

Front

push or pull upon an object resulting from the object's interaction with another object.

Back

An opera singers voice can break crystal glass is an example of

Front

resonance

Back

Vector

Front

are quantities that are fully described by both a magnitude and a direction.

Back

Torque

Front

influence which tends to change the rotational motion of an object (Fapp x Lever Arm)

Back

Impulse

Front

Change in momentum (mass x time)

Back

a sound wave that has a lower frequency has a wavelength that is

Front

longer

Back

Fundamental Frequency

Front

The lowest frequency produced by any particular instrument

Back

if you whirl a tin can on the end of string and the string suddenly breaks, the can will

Front

fly off, tangent to its circular path

Back

Rarefactions (Longitudinal Waves)

Front

a region in a longitudinal wave where the particles are furthest apart

Back

All simple machines ideally work on the principle that says

Front

work input equals work output

Back

Speed

Front

scalar quantity that refers to "how fast an object is moving"

Back

An object at rest may have?

Front

energy

Back

Scalar

Front

are quantities that are fully described by a magnitude (or numerical value) alone

Back

Vibration

Front

back and forth movement or wiggle of molecules (produces a sound)

Back

Section 2

(30 cards)

the momentum change of an object is equal to the _____

Front

impulse acting on the object

Back

when a cars speed triples its kinetic energy increases by ____ times?

Front

9 times

Back

How much power is required to do 40J of work on an object in 5 seconds?

Front

200 W

Back

The ratio of useful work output to total work input is called _____

Front

efficiency

Back

joule

Front

the unit of work

Back

Examples of potential energy

Front

Stretched spring, match, bent stick

Back

where is the center of gravity of a softball bat located?

Front

in the more massive end of the bat

Back

a ball is moving at 6m/s and has a momentum of 24kg m/s. What is the balls mass?

Front

4kg

Back

watt

Front

the unit of power

Back

if you try to touch your toes while standing flat against a wall, you will probably fall over. The reason this happens is that ____

Front

your center of gravity is not located directly above your support area

Back

a car travels in a circle with a constant speed. The net force of the car...

Front

is directed toward the center of the curve

Back

what has more momentum, a large truck moving at 30mph or a small truck moving at 30mph?

Front

the large truck

Back

How many joules of work are done on a box when a force of 25N pushes it 3m?

Front

75J

Back

An object that has kinetic energy must be in ____

Front

motion

Back

Potential energy is the energy an object has do to

Front

its location

Back

how much farther will a car traveling at 100km/s skid than the same car traveling at 50km/s

Front

4x as far

Back

the center of mass of a human body is located at the point that______

Front

changes as a person bends over

Back

A machine puts out 100 Watts of power for every 1000 watts put into . What is the efficiency of the machine?

Front

10%

Back

sound waves can not travel in ?

Front

a vacuum

Back

why are padded dashboards used in cars?

Front

They increase the time of impact in a collision

Back

How much work is done on a 60N box of books that you carry horizontally across a 6m room?

Front

0?

Back

the reason dead spots may be observed in a concert hall is

Front

because of destructive interference

Back

to turn a stubborn screw, it is best to use a screwdriver that has a

Front

wide handle

Back

an object will fall over if its center of gravity is

Front

not over the area of support

Back

When carrying a heavy load with one arm, why do you tend to hold your free arm away from your body?

Front

To change the center of gravity of your body and the load

Back

A freight train rolls along a track with considerable momentum. if it were to roll at the same speed but had twice as much mass, its momentum would be ____?

Front

doubled

Back

the speed of sound waves depend on

Front

the air temperature

Back

an arrow in a bow has 70 J of potential energy. Assuming no loss of energy to heat, how much kinetic energy will it have after its been shot?

Front

70J

Back

a 2kg ball is thrown at 3m/s. What is the momentum?

Front

6kg m/s

Back

which has more rotational inertia, a bicycle wheel or a solid disk of the same mass and diameter

Front

the wheel

Back