A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two second time. The acceleration is __________
Fill in the blank(s) with correct word
9.8 m/s2
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At room temperature, a typical person loses energy to the surroundings at the rate of 62.0 W
If this energy loss has to be made up by an equivalent food intake, how many Calories does this person need to consume every day just to make up this heat loss? A) 1040 Calories B) 1160 Calories C) 1280 Calories D) 1340 Calories E) 1400 Calories
When a bar magnet is thrust into a coil of wire, a greater voltage is induced with
A) a greater number of loops in the coil. B) faster thrusting motion. C) a stronger bar magnet. D) all of the above
The light reflected from a soap bubble (n = 1.40) appears red (? = 640 nm) at its center. What is the minimum thickness (in nm)?
a. 124 b. 104 c. 114 d. 134 e. 234
The traditional theory of the formation of our galaxy cannot explain
a. the existence of the disk of the galaxy b. the fact that the oldest stars in the galaxy are not metal free. c. the spherical distribution of the globular clusters d. the difference in metal abundance of the population I and II stars. e. the existence of the nuclear bulge.