A solid sphere, a solid cylinder, and a hoop all have the same mass and radius. Each are sent down identical inclined planes starting from rest. Their kinetic energies at the bottom of the incline are Ksphere,Kcylinder, and Khoop. Which of the following is true?
A. Ksphere>Kcylinder
B. Khoop>Ksphere
C. Khoop>Kcylinder
D. Kcylinder>Khoop
E. No answer above is correct.
Answer: E
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Suppose that Earth's ice caps melted, but everything else about the Earth's surface and atmosphere stayed the same. What would happen to Earth's average surface temperature?
A) The surface temperature would increase. B) The temperature would not be affected at all. C) The surface temperature would decrease. D) The surface temperature would change radically, until it was equal to the melting temperature of ice.
One mole of hydrogen, one mole of nitrogen and one mole of oxygen are held in a 22.4 × 10^3 cm3 enclosed vessel at 20°C. The pressure in the vessel, in N/m2, is
a. 109. b. 304. c. 326. d. 1.09 × 10^5. e. 3.26 × 10^5.
For constant linear acceleration, the velocity versus time graph is a
A) horizontal line. B) vertical line. C) sloped line. D) curve. E) none of the given answers.