A good tutor will be correct in saying that velocity and acceleration are
A) the same concept, but expressed differently.
B) rates of one another.
C) expressions for changing speeds.
D) different concepts.
Answer: D
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A ball gains speed while rolling down a hill due mainly to
A) its rotational inertia. B) its angular acceleration. C) a balanced torque. D) an unbalanced torque.
A 4.0-kg aluminum block is originally at 10°C. If 160 kJ of heat is added to the block, what is its final temperature? The specific heat capacity of aluminum is 910 J/kg ? K
A) 24°C B) 34°C C) 44°C D) 54°C
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C A 1 kg block of ice is removed from a freezer where its temperature was –10°C. The amount of heat absorbed by the ice as it warms to 0°C is
a. 2,000 J b. 4,000 J c. 20,000 J d. 40,000 J e. 334,000 J
A 100 kg mass is blown apart into a 60 kg piece and a 40 kg piece. After the blast, the two masses are moving apart with a relative velocity of 60 m/s. The velocity of the 60 kg mass is
A. 88 m/s. B. 67 m/s. C. 51 m/s. D. 40 m/s. E. 24 m/s.