A triangle has sides of length 7 cm and 11 cm. If the triangle is a right triangle, which of the following could be the length of the third side, to the nearest centimeter?
a. 11 cm
b. 8 cm
c. 16 cm
d. 17 cm
e. 7 cm
b
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An object moving in a circle undergoes centripetal acceleration
a. True b. False Indicate whether the statement is true or false
Slow surface evolution on the Moon is limited to
a. low-density masses of rock rising from the interior. b. low level meteorite impacts. c. moonquakes disturbing the surface features. d. motion along a network of small faults. e. All of the other choices are correct.
A proton (1.67 × 10-27 kg) is accelerated to 99.8% the speed of light. How much energy did the accelerator have to impart?
A) 14.8 GeV B) 13.9 GeV C) 38.9 GeV D) 7.52 GeV E) 223. GeV
Stan argues that momentum cannot be conserved when a collision is not a head-on collision. Rachel insists it is conserved because each body receives an impulse of equal magnitude. Rachel is correct because
a. each body exerts an equal and opposite force on the other during the collision. b. the forces act during equal time intervals. c. the law of conservation of momentum for an isolated system is a vector equation. d. of all of the above. e. of only (a) and (b) above.