The energy a white dwarf emits into space is
a. replaced by fusion of hydrogen atoms into helium.
b. replaced by fusion of helium atoms into carbon.
c. not replaced.
c
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What electric field has the same energy density as a 1.0 T magnetic field?
A. 1.0 V/m
B. 
C. 
D. 
E.
Before it arrived in orbit about Eros, the NEAR spacecraft visited
A) the asteroid Gaspra. B) the Moon. C) Mars. D) the asteroid Mathilde. E) Venus.
Flux: A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.40 T, as shown in the figure. The length of the loop L is 0.16 m and its width w is 0.040 m. What is the magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field?
A. 13 × 10-3 T ? m2 B. 2.6 × 103 T ? m2 C. 0.80 T ? m2 D. 2.6 × 10-3 T ? m2 E. 0 T ? m2
In the diagram, which of the transitions would absorb a photon with the greatest energy (shortest wavelength)?
a. Transition 1
b. Transition 2
c. Transition 3
d. Transition 4
e. Transition 5