When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?
A)
It is zero.
B)
It is less than its initial speed.
C)
It is equal to its initial speed.
D)
It is greater than its initial speed.
E)
Cannot be determined without additional information.
B
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For a body emitting blackbody radiation, the total power emitted is proportional to the 4th power of the body's absolute temperature: (T in kelvins) and the wavelength of the emitted EM radiation that has the highest intensity is inversely proportional to the body's absolute temperature according to: ( in meters, T in kelvins) Assume an object is emitting blackbody radiation. If the Kelvin
temperature of a body is doubled, the wavelength of the most intense light is ____________ the wavelength originally of the most intense light. a. 1/16th b. half c. the same as d. 2 times e. 16 times
When an artery gets a constricted region due to plaque, how does the pressure in this region compare to the pressure in an unconstricted region adjacent?
a. Since this is a closed system, the pressure is the same in both regions. b. In the constricted region the blood moves at a higher speed than in the unconstricted region resulting in an increased pressure. c. In the constricted region the blood moves at a higher speed than in the unconstricted region resulting in a decreased pressure. d. In the constricted region the blood moves at a lower speed than in the unconstricted region resulting in an increased pressure.
A solid aluminum cube rests on a wooden table in a region where a uniform external electric field is directed straight upward. What can we say concerning the charge on the top surface of the cube?
A) The top surface is neutral. B) The top surface is charged negatively. C) The top surface is charged positively. D) The top surface's charge cannot be determined without further information.
What is the angular momentum of the moon about the Earth? The mass of the moon is 7.35 × 10^22 kg, the center-to-center separation of the Earth and the moon is 3.84 × 10^5 km, and the orbital period of the moon is 27.3 days. Ignore the small offset of the center of mass of the system from the center of the Earth in your calculation