Which has the greater effect in cooling a substance, 1 g ice at 0°C or 1 g water at 0°C? Explain
One gram of ice, because it will take 80 cal of heat to change phase from ice to water
at 0°C.
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General Questions: You pull on a crate with a rope. If the crate moves, the rope's pull on the crate must have been larger than the crate's pull on the rope, but if the crate does not move, both of these pulls must have been equal.
A. True B. False
Which of the following values can be taken by the electron spin quantum number, ms?
A) ±1/2 B) 0 C) ±1 D) ±2 E) ±3
Calculate the minimum average power output necessary for a 55.8 kg person to run up a 12.0 m long hillside, which is inclined at 25.0° above the horizontal, in 3.00 s. You can neglect the person's kinetic energy. Express your answer in horsepower
(1 hp = 746 W) A) 1.24 hp B) 2.93 hp C) 1.86 hp D) 0.740 hp
If the headlights on a car are separated by 1.3 m, how far down the road can they be resolved if the angular resolution of the eye is about 5 × 10-4 rad?
A) 1.3 km B) 5.0 km C) 4.8 km D) 0.65 km E) 2.6 km