A rock has a density of 2 g/cm3. If another rock has twice as much mass but the same volume, its density must be ________ g/cm3.
A. 0.5
B. 2
C. 8
D. 4
Answer: A
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Suppose the date is March 21 and the Sun passes through your zenith at noon. Where are you?
A) the equator B) the Tropic of Cancer C) the Tropic of Capricorn D) the Arctic Circle E) the Antarctic Circle
Jason takes off across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible). Water exerts a force of 200 N on the skis
The coefficient of kinetic friction between skis and water is 0.10. Unfortunately, the skis run out of fuel after only 90 s. What is Jason's top speed? A) 150 m/s B) 240 m/s C) 24 m/s D) 90 m/s
Uncertainty Principle Using Energy and Time: An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 29 keV. Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19)
Fill in the blank(s) with the appropriate word(s).
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C After the 1 kg block of ice melts, the amount of heat required to raise its temperature to 10 °C is
a. 2,000 J. b. 4,000 J. c. 20,000 J. d. 40,000 J. e. 334,000 J.