An avalanche of ice and snow of mass 1 500 kg slides a vertical distance of 190 m down a mountainside. If the temperature of the ice, snow, mountain and surrounding air are all at 0°C, what is the change in entropy of the universe?
a. 2.05E+4 J/K
b. 1.02E+4 J/K
c. 5.12E+3 J/K
d. 3.41E+3 J/K
e. 1.04E+3 J/K
b
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Vision Problems: A person is nearsighted with a far point of 75.0 cm.(a) What focal length contact lens is needed to give him normal vision?(b) What is the power of the corrective lens?
What will be an ideal response?
John throws a baseball from the outfield from shoulder height, at an initial velocity of 39.2 m/s at an initial angle of 30.0° with respect to the horizontal. The ball is in its trajectory for a total interval of 4.00 s before the third baseman catches it at an equal shoulder-height level. (Assume air resistance is negligible.) What is the ball's horizontal displacement?
a. 76.4 m c. 136 m b. 38.2 m d. zero
If you move twice as far away from a lawn mower running in an open field, the amplitude of the sound you hear will be ___________ what it was before
a. the same as b. twice c. half d. four times e. one fourth
During the Cretaceous period, Earth experienced a worldwide rise in sea level caused by
A) melting of glacial ice. B) the thermal expansion of the crustal surface and the breakup of Pangaea. C) subduction of the seafloor. D) subduction of continental land masses.