An 8 000-kg aluminum flagpole 100-m long is heated by the sun from a temperature of 10°C to 20°C. Find the heat transferred (in J) to the aluminum if the specific heat of aluminum is 0.215 cal/g×°C
a. 7.2 × 10^5
b. 7.2 × 10^7
c. 7.2 × 10^3
d. 7.2 × 10^1
e. 7.2 × 10^2
B
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General Questions: If you pound a feather with a hammer, which one feels a greater force?
A. always the feather B. always the hammer C. The size of the force is always exactly the same on both of them. D. If the feather moves, then it felt the greater force. Otherwise the force was the same on both.
The half-life of a radioactive substance is affected by
A) pressure. B) temperature. C) age. D) all of the above E) none of the above
Diamond, graphite, and buckyballs are
a. isotopes. b. allotropes. c. isomeres. d. diatomic.
The deepest point of the Pacific Ocean is 11,033 m, in the Mariana Trench. What is the water pressure at that point? The density of seawater is 1025 kg/m3
A) 1.13 × 107 Pa B) 2.18 × 105 Pa C) 1.11 × 104 Pa D) 1.11 × 108 Pa E) 1.09 × 105 Pa