Kinetic energy can be measured in
A. watts
B. calories
C. grams
D. amperes
Answer: B. calories
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A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is _________
Fill in the blank(s) with correct word
Which of the following properties of the planets in our solar system is NOT explained by condensation theory?
A) direction of revolution B) rotation rates C) chemical compositions D) orbital shapes
A coaxial cable has an inner cylindrical conductor surrounded by cylindrical insulation and an outer cylindrical conducting shell. The outer shell carries the same current but in the opposite direction from that in the inner conductor as shown. If the coaxial cable sits in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is
A. a net force to the left. B. a net force to the right. C. a net force upwards. D. no net force but a slight shift of the inner conductor to the left and the outer conductor to the right. E. no net force but a slight shift of the inner conductor to the right and the outer conductor to the left.
Beyond the formation of iron, nuclear energy can be produced only by:
A) fusion of still heavier elements. B) ionization of the radioactive nuclei. C) fission of heavy nuclei back toward lighter ones. D) gravity. E) the dark force.