An electron is accelerated from rest through a potential difference of 1.02 MeV. If the rest energy of the electron is 0.51 MeV, how fast is the electron moving?
A. 0.57 c
B. 0.30 c
C. 0.67 c
D. 0.90 c
E. 0.94 c
E. 0.94 c
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The absolute potential at a distance of 2.0 m from a negative point charge is -100. V. What is the absolute potential 4.0 m away from the same point charge?
A) -0.40 kV B) -50. V C) -0.50 kV D) -25. V E) -0.20 kV
A rectangular coil (0.20 m × 0.80 m) has 200 turns and is in a uniform magnetic field of 0.30 T. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.080 N ? m. What is the current in the coil?
A. 5.0 mA B. 1.7 A C. 8.3 mA D. 1.0 A E. 42 mA
Stars with high masses live longer than stars with lower masses
Indicate whether the statement is true or false
Determine the equivalent capacitance of the combination shown when C = 15 mF
a.
20 mF
b.
16 mF
c.
12 mF
d.
24 mF
e.
75 mF