Physical Science Exam 2
Which of the following statements is not true?
Protons and electrons have equal masses
The image a camera lens forms on the film or sensor is...
always real
When a current passes through a resistance, the electric energy that is lost...
becomes heat
When a magnetized iron bar is strongly heated, its magnetic field...
becomes weaker
Light of which of the following colors has the highest frequency?
blue
Light of which of the following colors is scattered most in the atmosphere?
blue
The nucleus of an atom...
contains most of the atom's mass
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 path is an example of...
diffraction
The conventional unit of battery capacity is the ampere-hour, which is actually a unit of...
electric charge
The amplitude of a sound wave determines its....
loudness
Electric charge...
occurs only in seperate parcels of +/- 1.6 x 10 ^-19 C
Superconductivity occurs in certain substances.....
only at very low temperatures
The volt is the unit of electric....
potential difference
Molecular motion in a gas is the minimum possible at....
0 K
The melting point of water is 0 degrees C. Its freezing point is....
0 degrees C
The wavelength of a sound wave is not related to its...
amplitude
A converging lens of focal length f produces a virtual image of a real object when the object is...
at the distance f from the lens
A kilowatt hour is a unit of....
energy
When waves go from one place to another, they carry....
energy
When a sound wave goes from air into water, the quantity that remains unchanged is its....
frequency
Ultrasound refers to sound whose....
frequency is too high for most people to hear
Ohm's law....
holds only for metals
A negative electric charge....
interacts with both positive an negative charges
Relative to its object, a real image formed by a lens is always...
inverted
When a liquid freezes to become a solid....
it gives off heat
An object has a positive electric charge whenever....
it has a deficiency of electrons
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
In a transverse wave, the individual particles of the medium move....
perpendicular to the direction of travel
Which one of the following effects does not occur in all types of waves?
polarization
The image the lens of the eye forms on the retina is....
real and inverted
Light of which of the following colors has the longest wavelength?
red
Sound waves travel fastest in.....
solids
A magnet attracts....
some substances and repels others
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
When a gas is forced into a smaller volume without a change in temperature, its pressure increases because its molecules...
strike the container walls more often
The higher the frequency of a wave....
the shorter its wavelength
Of the following, a molecule is best described as....
the smallest particle of a substance that is representative of the substance
The image formed by a diverging lens of a real object is always which of the following?
virtual
