Is it possible to send waves to the moon from Earth?
A) No, because there is no medium of any kind between the earth and moon.
B) No, because there is no air between the earth and moon.
C) Yes, we could conceivably send a sufficiently loud sound wave.
D) Yes, we could send an electromagnetic wave.
E) Yes, we could send a water wave--in fact, we plan to colonize the moon, and solve the Los Angeles smog problem, by sending the entire population of California there on surfboards.
D
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Kinetic Energy: What is the minimum energy needed to change the speed of a 1600-kg sport utility vehicle from 15.0 m/s to 40.0 m/s?
A. 1.10 MJ B. 10.0 kJ C. 20.0 kJ D. 40.0 kJ E. 0.960 MJ
In the process of pair-creation by a high-energy photon, matter is
A) conserved. B) destroyed. C) created.
How come birds can land on overhead power lines without getting electrocuted?
a. Their feet are good insulators. b. They are saved by their small size. c. Both their feet are on the same wire, so they don't complete a circuit. d. They are just lucky, I guess.
An atom of the element iron has an atomic number of 26 and an atomic weight of 56. If it is neutral, how many protons, neutrons, and electrons does it have?
A) 26 protons, 30 neutrons, 26 electrons B) 26 protons, 30 neutrons, 30 electrons C) 26 protons, 56 neutrons, 26 electrons D) 13 protons, 43 neutrons, 13 electrons E) 13 protons, 56 neutrons, 13 electrons