A 20 N ball and a 40 N ball are dropped at the same time from a height of 10 meters. Air resistance is negligible. Which of the following statements is accurate?
A. After 1 second has elapsed, both balls have the same kinetic energy, since they have the same acceleration
B. Both balls hit the ground at the same time but gravity does more work on the heavy ball than on the light ball
C. The heavy ball has a greater acceleration and falls faster
D. The light ball has a greater speed, since it can accelerate faster than the heavy ball
Answer: B
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Calorimetry: How many grams of ice at -17°C must be added to 741 grams of water that is initially at a temperature of 70°C to produce water at a final temperature of 12°C. Assume that no heat is lost to the surroundings and that the container has negligible mass. The specific heat of liquid water is 4190 J/kg ? C° and of ice is 2000 J/kg ? C°. For water the normal melting point is 0°C and the heat of fusion is 334 × 103 J/kg. The normal boiling point is 100°C and the heat of vaporization is 2.256 × 106 J/kg.
Fill in the blank(s) with the appropriate word(s).
A rod of length 1.00 m has a mass per unit length given by 
, where 
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style="vertical-align: -2px;" width="5px" height="18px" />m2 about the y axis? What will be an ideal response?
In order for clouds to form, air must be lifted. The three principal lifting mechanisms are
A) orographic, condensational, and frontal lifting. B) orthographic, conversational, and frontal lobotomy. C) convectional, orographic, and frontal lifting. D) adiabatic, topographic, and inversional lifting.