At a distance of 10 m from a light bulb the rms value of the electric field is 16 V/m. What is the rms value of the electric field at a distance of 20 m from the light bulb?
A. 32 V/m
B. 16 V/m
C. 8.0 V/m
D. 4.0 V/m
E. 2.0 V/m
C. 8.0 V/m
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Answer the following statement(s) true (T) or false (F)
1. Transform boundaries result in new crust being formed at the surface. 2. The Andes Mountains are a result of continental-continental collision.
Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless 30.0 degrees incline. The vertically hanging mass is 6.00 kg and the mass on the incline is 4.00 kg. The acceleration of the 4.00 kg mass is
A. 2.98 
B. 3.92
C. 5.88
D. 6.86
E. 7.84
A +5.0-nC charge is at the point (0.00 m, 0.00 m) and a -2.0-nC charge is at (3.0 m, 0.00 m). What work is required to bring a 1.0-nC charge from very far away to point (0.00 m, 4.0 m)? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 15 nJ B) 3.6 nJ C) 11 nJ D) 7.7 nJ
For radio transmission, which has the higher frequency?
A) carrier wave B) sound wave C) neither of these