Physics 1210 Final Review

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is

20 km/h

A car traveling at 22 m/s comes to an abrupt halt on 0.1 second when it hits a tree. What is the deceleration in meters per second per second of the car?

220

A 4 kg ball has a momentum of 12 kg m/s. What is the balls speed?

3 m/s

If a rock initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be

3000 m/s

If the mass of an object does not change, a constant net force on the object produces constant

acceleration

Hang from a pair of gym rings and the upward support forces of the rings will always

add up to equal your weight

if the frequency of a certain wave is 10 hertz, its period is

0.1 second

which could burn a boy scout the most

100 g of steam at 100 degrees C

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second when taking off?

2

A 10-N falling object encounters 4 N of air resistance. The net force on the object is

6 N

If a car accelerates from rest at 2 meters per second per second, it speed 3 seconds later will be

6 m/s

A rock is thrown vertically into the air. At the top of its path, its acceleration in meters per second per second is

9.8

Starting from rest, the distance a freely falling object will fall in 0.5 seconds is about

None of the above (not 1 m, 10 m., or 1.00 m.)

the fact that desert sand is very hot in the day and very cold at night is evidence that sand has

a low specific heat

near the top of a mountain, water in an open pot boils at

a lower temperature that at sea level

a good heat conductor is

a poor insulator

In science, a theory is

a synthesis of a large body of well-tested knowledge

a standing wave occurs when

a wave reflects upon itself

A skydiver of mass 100 kg experiences air resistance of 500 N, and an acceleration of

about 0.5 g

objects that radiate relatively well

absorb radiation relatively well

Disregarding air resistance, objects fall with constant

acceleration

Like a transverse wave, a longitudinal wave has

amplitude, frequency, wavelength and speed

Which has zero acceleration? An object

at rest, moving at constant velocity, in mechanical equilibrium

An object in mechanical equilibrium is an object

at rest; moving with constant velocity; having no acceleration

the vibrations of a transverse wave move in a direction

at right angles to the direction of wave travel

if you want to cook eggs by boiling them while in the mountains, them compared to sea level cooking, you should

boil the eggs for a longer time

heat energy is measured in units of

calories and joules

we feel uncomfortably warm on a muggy day because water molecules are

condensing on our bodies

Erasthothenes learned about the position of the sun on June 22 by

consulting library information

If no external forces are acting on a moving object, it will

continue moving at the same velocity

Suppose a particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a second force of 10 N in the opposite direction from the first force. The particle with both forces acting on it

continues at the speed it had when it encountered the second force

substances that absorb heat energy by the process of

convection, conduction and radiation

A skydiver jumps from a high-flying plane. As her velocity of fall increase, her acceleration

decreases

as a piece of metal with a hole in it cools, the diameter of the hole

decreases

warm air rises because faster-moving molecules tend to move to regions of less

density and less pressure

The two measurements necessary for calculating average speed are

distance and time

when heat is added to boiling water, its temperature

does not change

A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is

doubled

to turn ice at zero degrees Celsius to water at zero degrees Celsius, we must add

energy

hot water has a relatively high rate of

evaporation

energy transfer buy convection is primarily restricted to

fluids

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to

follow a straight-line path

The newton is a unit of

force

the pitch of a musical sound depends on the sound wave's

frequency

when you touch a cold piece of ice with your finger, energy flows

from your finger to the ice

the molecules in a room-temperature glass of water jostle around at

great variety of speeds

An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration

halves

steam burns are more damaging than burns caused by boiling water because steams

has more energy per kilogram than boiling water and gives up additional energy when it condenses

As we grow older, we have the greatest difficulty hearing frequencies that are

high

the moderate temperature of islands throughout the world has much to do with water's

high specific heat

Padded dashboards in cars are safer in an accident than nonpadded ones because an occupant hitting the dash has

increased time of impact

In each second of free fall, the distance a freely falling object will fall is

increasing

which of the following normally warms up fastest when heat is applied

iron

your feet feel warmer on a rug than on a tile floor because a rug

is a better insulator than tile

For an action force, there must be a reaction force that

is exactly equal in magnitude

Ice has a lower density that water because ice

is made of open-structured, hexagonal crystals

A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun, straight down toward the water. Neglecting air resistance, the acceleration just before striking the water

is the same for each bullet

compression and rarefaction are characteristic of

longitudinal waves

a substance that heats up relatively quickly has a

low specific heat

A force is a vector quantity because it has both

magnitude and direction

A kilogram is a measure of an object's

mass

Compared to a 1 kg block of solid iron, a 2 kg block of solid iron has twice as much

mass, volume, inertia

Twelve seconds after starting from rest, an object falling freely will have a speed of

more than 100 m/s

if you push for a half hour or a whole hour against a stationary wall

no work on the wall is done in either case

we are best at hearing

none of the above choices are correct (ultrasonic, infrasonic, or both)

Of the sciences known as physics, chemistry, and biology, the most basic is

physics

a sound source of high frequency emits a high

pitch

the planet earth loses heat mainly by

radiation

which doesn't belong to the same family?

radio waves

when a gas is changed to a liquid state, the gas

releases energy

when you tune a radio to a certain station, you match the frequency of the internal electrical circuit to the frequency of the wanted radio station. In doing so you are employing the principle of

resonance

A rifle recoils while firing a bullet. The speed of the rifle's recoil is small because the

rifle has much more mass than the bullet

Two factors that greatly affect air resistance on falling objects are the

size and speed of the object

which of the following is not a transverse wave

sound

sound travels faster in

steel

a factor that usually determines whether a substance is in the solid, liquid, gaseous, or plasma state is its

temperature

heat energy travels from an object with a high

temperature to an object with a lower temperature

Your weight is

the gravitational attraction force between you and the earth

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that:

the milk carton has inertia

A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about

the same

Compared to the mass of a certain object on earth, the mass of the same object on the moon is

the same

the higher the temperature of an object

the shorter the wavelength it radiates

We are warmed by condensation because water molecules in the air that strike our bodies

transfer some of their kinetic energy to us

While an object near the earth's surface is in free fall, its

velocity increases

a common source of wave motion is a

vibrating object

A wiggle in time is a

vibration

during a very cold winter, water pipes sometimes burst. The reason for this is

water expands when freezing

The Doppler effect is the characteristic of

water, light and sound waves

water interference occurs for

water, light and sound waves

double the frequency of a sound and you halve its

wavelength

sound will be louder if a struck tuning fork is held

with its base against a table top

A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is

zero

When a falling object has reached its terminal velocity, its acceleration is

zero

a weight is suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is

0.5 Hertz

A 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5 kg bowling ball that is initially at rest on a friction-less surface. The speed of the putty thereafter is

1/6 m/s

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

10 N

An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about:

10 m/s

If a freely falling object where somehow equipped with a speedometer, its speed reading would increase each second by about

10 m/s

A 10 kg brick and a 1 kg book are dropped in a vacuum. The force of gravity on the 10 kg bricks is

10 times as much

A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is

400 N


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