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
E
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A pizza oven is approximated as a cubic container with upper surface heated, a door that conducts heat out, and all sides and bottom well insulated and reradiating. The inside dimensions of the oven are 1.5 m on a side. When in operation with the door closed the burner surface is at 500 K, and 3 kW of power are used by the heater. Assuming the emissivity of the heater and the inside surface of the door is 0.8, (a) determine the equilibrium temperature of the inside surface of the door and (b) if the door is opened and the room is at 30ºC estimate the equilibrium temperature of the heater, assuming that 3 kW of power is still used.
What will be an ideal response?
The Trojan asteroids are found
A) with the others, between Mars and Jupiter; their red color gives them their name. B) orbiting around the Kuiper Belt body Hector. C) sixty degrees ahead or behind Jupiter, sharing its orbit about the Sun. D) beyond Neptune, with orbits similar to Pluto's. E) closer on average to the Sun than is the Earth.
A Doppler red shift indicates
a. a shift toward lower frequencies. b. a shift toward longer wavelengths. c. that a light source is receding relative to the observer. d. all of these.
The scientific method is most effective in
A) making hypotheses. B) gaining, organizing, and applying new knowledge. C) discovering new things. D) making theories. E) performing experiments.