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Physics

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Vada Boyer

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Cards in this guide (13)
Which law states that the total momentum does not change when it is transferred

The law of conservation states that the total momentum does not change when it is transferred.

A desk weighs 500 N with gravity applying that force downward If you apply 275 N upward force and a friend helping you applies 275 N upward force what is the net force applied

50 N upward

What most influences whether or not an object will float

An object's density influences its buoyancy, thus determining whether or not an object will float

Which type of force is exerted on the support ropes of a hammock when you lie in it

Tension

How is sound energy produced and transmitted

by vibration of particles and fluids.

Which factors must be known to calculate an object's gravitational potential energy

height and mass

A speed boat is moving at a velocity of 25 ms runs out of gas and drifts to a stop 3 minutes later 100 meters away What is the rate of deceleration

0.14

Which force allows hot air balloons to fly

Buoyancy allows hot air balloons to fly.

What best describes thermal energy

energy of molecular motion

Which of these is a type of drag force turbulence tension thrust and compression

turbulence

What following objects has the greatest density in grams

50 gram object that is 25 cm

³

What infroemation is needed to calculate the amount of energy needed to heat a volume of water to some temperature

You need to know the amount of water (mass), how many degrees you want to heat it up, and the specific heat of water. Then - if everything is in compatible units - you must simply multiply the three together.

What is the si unit for pressure which is equal to 1 n exerted over 1m 2

That unit has the special name "pascal".

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