A 1.00-m3 object floats in water with 20.0% of its volume above the waterline. What is the force that Earth exerts on the object? The density of water is 1000 kg/m3
A) 1,960 N
B) 7,840 N
C) 9,800 N
D) 11,800 N
B
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Estimate the heat loss due to natural convection from the house shown in the figure.
From lowest frequency to highest frequency, which of the following correctly orders the different regions of electromagnetic radiation?
A) infrared, visible light, ultraviolet, x-rays, gamma rays, radio B) radio, infrared, visible light, ultraviolet, x-rays, gamma rays C) visible light, infrared, x-rays, ultraviolet, gamma rays, radio D) gamma rays, x-rays, visible light, ultraviolet, infrared, radio E) Radio, x-rays, visible light, ultraviolet, infrared, gamma rays
Dark energy can exist in completely empty space.
Answer the following statement true (T) or false (F)
Two objects, one of mass m and the other of mass 2 m, are dropped from the top of a building. When they hit the ground:
A) both will have the same kinetic energy. B) the heavier one will have twice the kinetic energy of the lighter one. C) the heavier one will have four times the kinetic energy of the lighter one. D) the heavier one will have half the kinetic energy of the lighter one. E) the heavier one will have one-fourth the kinetic energy of the lighter one.