Given the current emission rate of carbon dioxide, how much will the Earth's average temperature increase over the next century?
A) 7-10°C B) 0°C C) 0-3°C D) 5-7°C E) 3-5°C
E
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A dog has three puppies. Spot weighs 12 ounces. Rascal weighs 9.5 ounces. Socks weighs 10.2 ounces. What is the total weight of the litter?
A) 31.7 ounces B) 31 ounces C) 32 ounces D) 30 ounces E) 31.70 ounces
A 60.0-kg person drops from rest a distance of 1.20 m to a platform of negligible mass supported by an ideal stiff spring of negligible mass. The platform drops 6.00 cm before the person comes to rest. What is the spring constant of the spring?
A) 2.56 × 105 N/m B) 3.92 × 105 N/m C) 5.45 × 104 N/m D) 4.12 × 105 N/m E) 8.83 × 104 N/m
The biological damage caused by radioactive materials is due to
A) nuclear fusion occurring within biological cells. B) thermal energy created by radioactive decay within biological cells. C) nuclear fission occurring within biological cells. D) the fast-moving daughter nuclei [or residual nuclei] passing through biological cells. E) the fast-moving alpha, beta, and gamma particles passing through biological cells.
Power: Jill does twice as much work as Jack does and in half the time. Jill's power output is
A. the same as Jack's power output. B. one-fourth as much as Jack's power output. C. one-half as much as Jack's power output. D. twice Jack's power output. E. four times Jack's power output.