In the process of pair-creation by a high-energy photon, energy is
A) conserved. B) created. C) destroyed.
A
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When 10 grams of hot water cool by 1°C, the amount of heat given off is
A) 41.9 calories. B) 41.9 Calories. C) 41.9 joules. D) more than 41.9 joules. E) none of the above
A neutral atom has an electron configuration of 1s22s22p6. If a neutral atom holds one additional electron, what is the ground state configuration?
A) 1s22s22p63s1 B) 1s22s22p7 C) 1s22s32p6 D) 1s32s32p6 E) none of the given answers
Estimate the acceleration of the Earth relative to the Sun in m/s²
1.less than 0.003 2.between 0.003 and 0.03 3.between 0.03 and 0.3 4.between 0.3 and 3 5.between 3 and 30 6.between 30 and 300 7.between 300 and 3,000 8.between 3,000 and 30,000 9.more than 30,000 10.Impossible to determine
A 3.0-kg block is on a frictionless horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 2.0 N) acting at an angle of 22° above the horizontal is applied to the block. At what rate is the force P doing work at t = 2.0 s?
a. 2.3 W b. 2.0 W c. 1.4 W d. 1.7 W e. 1.2 W