Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Kinetic energy
a. is definitely conserved.
b. is definitely not conserved.
c. may or may not be conserved.
d. none of the above
b
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What characteristic of light mostly relates to color?
A) frequency B) amplitude C) both of these
In a ten-billion to one scale model, the Sun and the Earth are about the size of
A) a grapefruit and a grape. B) a grape and a grain of sand. C) a grapefruit and a grain of sand. D) a basketball and a grape.
An isotope of the element Manganese (Mn) has an atomic number of 25 and a mass number of 55. Assuming the atom is neutral, this means it has
A) 55 protons, 55 electrons, and 25 neutrons B) 25 protons, 25 electrons, and 30 neutrons C) 25 protons, 30 electrons, and 25 neutrons D) 25 protons, 25 electrons, and 55 neutrons
A vector has components Ax > 0, and Ay < 0, the angle that this vector makes with the positive x-axis must be in the range
A) 0° to 90°. B) 90° to 180°. C) 180° to 270°. D) 270° to 360°.