A child riding on a swing, Andrea, rises to a height 1.0 m above the lowest point. Another child of equal mass, Brian, has a speed at his lowest point that is twice as great as Andrea's speed at her lowest point. Brian will rise
A. twice as high.
B. four times as high.
C. to the same height.
D. to a height which depends on the mass.
Answer: B
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A solid steel sphere with a radius of 2.0 m falls off a ship and sinks to a depth where the pressure is 15 MN/m2. The bulk modulus for this steel is 1.6 × 1011 N/m2. What is the change in the radius of the sphere?
A) -0.021 mm B) -4.2 mm C) -0.42 mm D) -0.19 mm E) -0.062 mm
The zeroth law of thermodynamics allows us to define:
A. work B. pressure C. temperature D. thermal equilibrium E. internal energy
How is Titan, the moon of Saturn, similar to the Earth?
A) like the Earth, Titan has an atmosphere made mostly of molecular nitrogen B) Titan, like the Earth, has an internal magnetic field C) like the Earth, Titan has oceans of liquid water on its surface D) Titan is almost the same size as the Earth
The density of water at 0°C is 999.84 kg/m3 and at 4°C it is 999.96 kg/m3. A 1.0-liter container, full to the brim with water at 4°C is placed in the refrigerator
By the time that the temperature of the water reaches 0°C, how much of the water has spilled from the container, assuming that the contraction of the container is negligible? A) 1.1 × 10-7m3 B) 1.2 × 10-7m3 C) 1.3 × 10-7m3 D) 1.4 × 10-7m3 E) 1.5 × 10-7m3