The primary source of the energy radiated by a star, such as the sun, is
A) fusion reactions in which helium is fused to form iron.
B) fusion reactions in which hydrogen is fused to form helium.
C) beta decay.
D) fission reactions involving uranium.
E) alpha decay.
Question 2
An 800 V/m electric field is directed along the +x-axis. If the potential at x = 0 m is 2000 V, what is the potential at x = 2 m?
A)
200 V
B)
400 V
C)
600 V
D)
800 V
E)
1000 V
