Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is 100 J
a. True
b. False
Indicate whether the statement is true or false
True
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A SETI search using the 300-meter diameter Arecibo radio telescope can pick up a 10 million Watt at a distance of 1,000 light-years
If we were to detect a similar signal coming from 10,000 light-years away, how powerful would the alien antenna have to be? A) 1 billion Watts B) 10 million Watts C) 10 billion Watts D) 100 million Watts
The correspondence principle applies to
A) theories of submicroscopic phenomena. B) theories of macroscopic phenomena. C) all good theories.
Which of these will penetrate into lead?
A) alpha particle B) beta particle C) gamma ray. D) all of the above
Two vases of different shapes each contain a goldfish. In the position shown, the fish that will feel the greatest pressure is
1) A 2) B 3) both experience the same because 4) the weight of water is greater in vase B. 5) fish A is nearer to the bottom of the vase. 6) both fish are at the same depth.