Physical Science Test 2
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