A box is sliding down an incline tilted at a 12.0° angle above horizontal
The box is initially sliding down the incline at a speed of 1.50 m/s. The coefficient of kinetic friction between the box and the incline is 0.340. How far does the box slide down the incline before coming to rest?
A) 0.920 m
B) 2.33 m
C) 1.78 m
D) 0.720 m
E) The box does not stop. It accelerates down the plane.
A
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How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?
A) It should have a higher fraction of elements heavier than hydrogen and helium. B) It should orbit the galactic center at a much higher rate of speed. C) It should be higher in mass. D) It should be moving very fast relative to the Earth.
Each pattern shown below would appear on a screen when monochromatic light first passes through a narrow slit of width a and then strikes a screen. The darkest areas on the page represent the brightest areas on the screen. In which case is the slit illuminated with light of the longest wavelength?
A.
B.
C.
D.
E.
Two lamps, a thick-filament one and a thin-filament one, are connected in parallel to a battery. The current is greater in the lamp with the
A) thick filament. B) thin filament. C) same in each
The plastic-like substratum on which the lithospheric plates move is called the
a. outer core. b. endosphere. c. isosphere. d. asthenosphere.