Telescopes designed to study the earliest stages in galactic lives should be optimized for observations in
A) infrared light.
B) visible light.
C) radio waves.
D) x-rays.
A) infrared light.
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Uniform Circular Motion: If you swing a bucket of water fast enough in a vertical circle, at the highest point the water does not spill out. This happens because an outward force balances the pull of gravity on the water.
A. True B. False
When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s) that may be emitted as the atom eventually returns to the ground state?
a. 5 c. 4 b. 3 d. The correct value is not given.
Identical 2.0-mC charges are located on the vertices of a square with sides that are 2.0 m in length. Determine the electric potential (relative to zero at infinity) at the center of the square
a. 38 kV b. 51 kV c. 76 kV d. 64 kV e. 13 kV
If the current in the 4.0-? resistor is 1.4 A, what is the magnitude of the potential difference, VA ? VB?
a.
69 V
b.
55 V
c.
62 V
d.
48 V
e.
31 V