Jupiter is a ball of gas
a. True
b. False
Indicate whether the statement is true or false
False
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Two parallel wires are separated by 0.25 m. Wire A carries 4.1 A and Wire B carries 10 A, both currents in the same direction. The magnetic permeability in empty space µ0 = 4p × 10^-7 T×m/A. The magnitude of the force on 1.4 m of Wire A is:
a. 2.6 × 10^–5 N. c. less than 1.0 × 10^–5 N. b. 4.6 × 10^–5 N. d. 3.2 × 10^–5 N.
Two converging lenses, the first with focal length 25 cm and the second with focal length 20 cm, are separated by 30 cm. A 4.0 cm tall object is placed 50 cm in front of the first lens. Where is the image caused by the first lens? Give the most inclusive answer.
A. 50 cm after the first lens B. 20 cm after the second lens C. both 50 cm after the first lens and 20 cm after the second lens D. 50 cm after the second lens E. 20 cm before the second lens
If a quasar has a red shift of 0.98, then it is receding from Earth at 98 percent the speed of light
Indicate whether the statement is true or false
A photon absorbed by an electron will give up more energy to the electron if the photon:
a. is not spread out over many electrons. b. is moving faster. c. is moving slower. d. has a higher frequency.