The latent heat of vaporization of water is roughly 10 times the latent heat of fusion of water. The amount of heat required to boil away 1 kg of water is 10 times the amount of heat required to melt 1 kg of ice
Indicate whether the statement is true or false
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The oldest rocks found on Earth are about ____ years old
a. 14 billion b. 10.5 billion c. 7.0 billion d. 3.9 billion
Rotational Dynamics: As shown in the figure, a 35.30-kg box is attached to a light string that is wrapped around a cylindrical frictionless spool of radius 10.0 cm and moment of inertia 4.00 kg ? m2. The spool is suspended from the ceiling, and the box is then released from rest a distance 3.50 m above the floor. How long does it take for the box to reach the floor?
A. 2.97 s B. 2.85 s C. 0.892 s D. 4.18 s E. 5.89 s
Free Fall: A ball is thrown downward in the absence of air resistance. After it has been released, which statement(s) concerning its acceleration is correct? (There could be more than one correct choice.)
A. Its acceleration is constantly increasing. B. Its acceleration is constant. C. Its acceleration is constantly decreasing. D. Its acceleration is zero. E. Its acceleration is greater than g.
From what height above the surface of the earth should an object be dropped to initially have an acceleration of 0.54g? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 5.97 × 1024 kg, Rearth = 6.38 × 106 m)
A) 2300 km B) 1700 km C) 5400 km D) 2900 km