What is the magnetic moment of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm × 8.0 cm?
A) 0.023 A?m2
B) 0.23 A?m2
C) 2.3 A?m2
D) 23 A?m2
E) 230 A?m2
C
You might also like to view...
Which of the following statements best describes how the uncertainty principle affects conservation of energy?
A) The uncertainty principle allows very short time-scale violation of energy conservation, but energy must still be conserved on time scales that allow measurement. B) The uncertainty principle invalidated the law of conservation of energy, and as a result, this law is no longer useful to physicists. C) The uncertainty principle does not apply to energy, so conservation of energy is not affected by it. D) The uncertainty principle tells us that the law of conservation of energy applies only to very large objects, not to atoms or molecules.
Why must radio telescopes have very large dishes?
A. A large mirror is necessary to resolve radio-emitting images. B. The large dish is to compensate for atmospheric absorption of radio waves. C. Large radio telescopes are easier to repair than small instruments. D. Radio-emitting objects are very far from Earth, and so are very dim. E. Size is immaterial to quality observations.
Water (density = 1 × 10^3 kg/m3) flows at 16 m/s through a pipe with radius 0.040 m. The pipe goes up to the second floor of the building, 3.0 m higher, and the pressure remains unchanged. What is the speed of the water flow in the pipe on the second floor?
a. 13 m/s c. 15 m/s b. 14 m/s d. 16 m/s
Space and time are
A) bound together. B) independent entities.