A car starting from rest moves with constant acceleration of 2 m/s2 for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2 m/s2. How far does it travel?
A) 400 m
B) 100 m
C) 500 m
D) 300 m
E) 200 m
A
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Predict the heat transfer per unit area for warm water at 70ºC placed in a large pan at 10ºC.
What will be an ideal response?
A computer accessory salesman attempts to convince you to purchase a "solar neutrino" shield for your new computer. (It's even "on sale"!) Why do you turn down this excellent offer?
A) Neutrinos rarely, if ever, interact with your computer. B) The Earth's natural magnetic field already offers excellent protection against the onslaught of solar neutrinos. C) Solar neutrinos are generated by solar winds, but we're in a solar minimum now, so the risk of damage is very low. D) There's no such thing as a solar neutrino.
A certain car traveling 34.0 mph skids to a stop in 29 meters from the point where the brakes were applied. In approximately what distance would the car stop had it been going 105.4 mph?
A) 279 meters B) 158 meters C) 90 meters D) 51 meters E) 29 meters
A product of incomplete combustion that is a major air pollutant is
a. H2O. b. O2. c. NOx. d. CO.