Physical Science Test 2

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

An absolute temperature of 100 K is the same as a Celsius temperature of

-173 degrees C

A 2-kg book is held 1 m above the floor for 50 seconds. The work done is

0

Molecular motion in a gas in the minimum possible at

0 K

A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2s. The average power he develops during the lift is

1.78kW

Ocean waves with a period is 10s are found to have a wavelength of 120m. Their speed is

12m/s

The musical note A has a frequency of 440 Hz and its wavelength in seawater is 3.5m. The speed of sound in seawater is

1540 m/s

The speed of light in a transparent plastic whose index is refraction is 1.5 is

2 X 10^8 m/s

Radio amateurs are permitted to communicate on the "10-meter band." What frequency of radio waves corresponds to a wavelength of 10 meters? The speed of radio waves is 3 X 10^8 m/s

3.0 X 10^7 m/s

Six kJ of work is used to lift an object to a height of 100m. The object's approximate mass is

6kg

Ethanol boils at 172 degrees F. The Celsius equivalent of this temperature is

78 degrees C

Rolling a ball up an inclined plank requires an amount of work proportional to the

Height the ball is raised

Which of the following is (are) not a unit of power? A. Joule-second B. Watt C. Newton-meter/second D. Horse power

Joule-second

Light of which of the following colors has the longest wavelength? A. Red B. Blue C. Yellow D. Green

Red

A golf ball and a ping-pong ball are dropped in a vacuum chamber. When they have fallen halfway down, they have the same

Speed

Which of the following quantities is always the same to all observers? A. Time intervals B. The speed of an object C. The speed of sound D. The speed of light

The speed of light

Relative to the radio signals sent out by a spacecraft headed away from the earth, the signals that are received on the earth have

a longer wavelength

The image a camera lens forms on the film or sensor is

always real

The freezing point of a substance is always lower than its

boiling point

Heat transfer in a vacuum

can take place only by radiation

A converging lens of focal length(f) produces a virtual image of a real object when the object is

closer than (f) from the lens

The properties of several different materials are being compared. If the samples all have the same volume, the one with the greatest mass also has the greatest

density

Which of the following quantities is independent of the size and shape of an object composed of a given material?

density

The bending of waves around the edge of an obstacle in their paths is an example of

diffraction

When waves go from one place to another, they carry

energy

A converging lens of focal length(f) produces a real image of a real object when the object is

farther than (f) from the lens

Ultrasound refers to sound whose

frequency is too high for most people to hear

Molecules are, in general, farthest apart from one another in

gases

Relative to its object, a real image formed by a lens is always

inverted

Ice floats in water because

its density is less than that of water

When heat is added to a body of matter, the resulting temperature increase does not depend upon

its shape

An object that has linear momentum must also have

kinetic energy

On a molecular level heat is

kinetic energy

If a spaceship 100 m long when at rest on the earth were to travel at nine-tenths the speed of light, its length as measured by an observer on the earth would be

less than 100 m.

A cake of soap is placed in a bathtub, sinks. The buoyant force on the soap is

less than its weight

In the formula E^0=mc^2, the symbol c represents the speed of

light

The amplitude of a sound wave determines its

loudness

In order for an object to sink when placed in water, the object's average density must be

more than that of water

Heat transfer by convection occurs

only in liquids and gases

In a transverse wave, the individual particles of the medium move

perpendicular to the direction of travel

The watt is a unit of

power

A pure musical note causes a think wooden panel nearby to vibrate with the same frequency. This is an example of

resonance

An example of a purely longitudinal wave is a

sound wave

Of the following kinds of waves, the ones that cannot travel through a vacuum are

sound waves

Dispersion is the term used to describe the

splitting of white light into its component colors in refraction

the higher the frequency of a wave,

the shorter its wavelength

A molecule is best described as

the smallest particle of a substance that is representative of the substance

An example of a wave that is partly longitudinal and partly transverse is a

water wave

The amplitude of the wave shown in the figure is

B

Light of which of the following colors has the highest frequency? A. Red B. Blue C. Yellow D. Green

Blue

The length of the wavelength shown in the figure is

C

A complete cycle of the wavelength shown in the figure is

D


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