A person with a mass of 60 kg climbs up to a diving board 4 meters above a swimming pool. (a) How much work does the person do? (b) What is the diver's kinetic energy upon entering the water after diving off?
(a) 2,352 J,(b) 2,352 J
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The _____________strength of a brittle or composite material is the maximum tensile stress determined from a three-point bend test.
Fill in the blank(s) with the appropriate word(s).
If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would
A) be the same. B) double. C) quadruple. D) be eight times as much as now. E) none of the above
A train moving 30. m/s approaches a station and sounds its whistle and passengers standing at the station hear a pitch of 440. cycles/second. What pitch will be heard when the train is at rest at the station? (assume the air temperature is 20.°C)
What will be an ideal response?
Which of the following is not massless?
A) neutrino B) graviton C) photon D) muon