If a proton has a kinetic energy of 1.000 GeV, what is its momentum? 
A. 1.938 GeV/c
B. 1.000 GeV/c
C. 938.0 GeV/c
D. 2.872 GeV/c
E. 1.696 GeV/c
E. 1.696 GeV/c
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Terminal Voltage and Internal Resistance: When an external resistor of resistance R1 = 14 ? is connected across the terminals of a battery, a current of 6.0 A flows through the resistor. When a different external resistor of resistance R2 = 64.4 ? is connected instead, the current is 2.0 A. Calculate (a) the emf of the battery and (b) the internal resistance of the battery.
Fill in the blank(s) with the appropriate word(s).
If the radiant energy from the sun comes in as a plane EM wave of intensity 1 340 W/m2, calculate the peak values of E and B
a. 300 V/m, 10-4 T b. 1 000 V/m, 3.35 × 10^-6 T c. 225 V/m, 1.60× 10-3 T d. 111 V/m, 3.00 × 10^-5 T e. 711 V/m, 2.37 × 10^-6 T
Imagine that in a certain region of space, an electric field is uniform in magnitude and direction. What can we conclude about the magnetic field in that region?
A. 
= 0.
B. must be uniform in space.
C. must be constant in time.
D. must be both uniform in space and constant in time.
E. There are no restrictions on .
F. There are other restrictions on (specify).