What is true of Mars?
A) Its atmosphere is mostly water vapor.
B) Definite microfossils have been found.
C) Its magnetic field is stronger than Earth's.
D) Iron oxide on the surface is responsible for its reddish color.
E) A pool of water was discovered by the Mars Rover.
D
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Gravitational lensing of distant, faint irregular galaxies may be the key to:
A) mapping the dark matter. B) quasar energy production. C) understanding galactic rotation curves. D) understanding active galactic nuclei. E) determining galactic redshifts.
Explain the difference between radial and transverse velocities
What will be an ideal response?
The south pole of a bar magnet is moved toward a short helical coil of wire (solenoid) along the axis of the coil. The coil has 100 turns and the ends of the coil are connected to form a closed circuit. If the coil is replaced with a single loop of the same type of wire, and the magnet is moved exactly as before, the magnet experiences a force that is
A. repulsive and 100 times larger. B. attractive and 100 times larger. C. the same as before. D. attractive and 100 times smaller. E. repulsive and 100 times smaller.
A __________ has integral spin
Fill in the blank(s) with correct word