An ion is released from rest and moves due to the force from an electric field from a position in the field having a potential of 14 V to a position having a potential of 8 V. The ion:
a. must have a positive charge.
b. must have a negative charge.
c. can have either a positive or a negative charge.
d. must be neutral.
a
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The outer core
A) has a plastic-like flow. B) flows fast enough to power Earth's magnetic field. C) is solid as a rock. D) transmits S-waves.
A ____________ will be obtained from an observed star's spectrum that has been shifted towards shorter wavelengths as the star is moving ________ us
Fill in the blank(s) with correct word
Power is defined as the _________________ is done.
A) Amount of work which B) Angle at which C) Direction at which work D) The rate at which work.
If a source of light is approaching us at 3,000 km/sec, then all its waves are
A) redshifted by 1%. B) not affected, as c is constant regardless of the direction of motion. C) blueshifted out of the visible spectrum into the ultraviolet. D) blueshifted by 1%. E) redshifted out of the visible into the infrared.