A constant force acts on a moving object. The object makes a fixed magnitude of displacement in some direction
In general, in what direction is the displacement that will result in the object traveling with the least kinetic energy after the displacement occurs? A)
The same direction as the force
B)
The direction does not matter.
C)
In a direction perpendicular to the plane of the force and the velocity of the object
D)
The opposite direction as the force
E)
Any direction perpendicular to the force
D
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What would be the greatest effect on the ideal gas law if there is a slight repulsive force between the molecules?
A) At low temperatures, the pressure would be greater than that predicted by the ideal gas law. B) At high temperatures, the pressure would be greater than that predicted by the ideal gas law. C) At low temperatures, the pressure would be less than that predicted by the ideal gas law. D) At high temperatures, the pressure would be less than that predicted by the ideal gas law. E) There is no effect.
Ultraviolet light is shone on a piece of metal that has a known work function, and electrons are observed being produced through the interaction of the light with the metal. The lamp that produces the light is now replaced with a lamp of the same intensity, but which produces photons having a shorter wavelength. What difference is observed in the number of electrons produced per unit time?
A. The same number are produced. B. Fewer are produced . C. Without knowing more about the wavelengths used, one cannot answer. D. More are produced.
One reactant of photosynthesis is
a. hydrogen. b. oxygen. c. carbon dioxide. d. methane.
Multiplying a 4 significant figure number by a 3 significant figure number and then dividing the product by a six significant figure number yields a number with how many significant figures?
a. 7/6 c. 2 b. 3 d. 13