When used in a single instrument to greatly enhance its resolution, the four separate mirrors of the VLT act as a(n) ________
Fill in the blank(s) with correct word
interferometer
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Impulse: A 0.140 kg baseball is thrown horizontally with a velocity of 28.9 m/s. It is struck with a constant horizontal force that lasts for 1.85 ms, which results in a velocity of 37.0 m/s in the opposite direction. What was the magnitude of the horizontal force?
A. 0.613 kN B. 2.19 kN C. 2.80 kN D. 4.99 kN
A stunt pilot weighing 0.70 kN performs a vertical circular dive of radius 0.80 km. At the bottom of the dive, the pilot has a speed of 0.20 km/s which at that instant is not changing. What force does the plane exert on the pilot?
a. 3.6 kN up b. 4.3 kN up c. 2.9 kN down d. 2.9 kN up e. 5.8 kN down
The Moon, Mercury, and Mars do not have plate tectonics because
A) they have cooled so rapidly that they do not have enough internal convection to break up their thick crusts B) they have no oceans for subduction and seafloor spreading to occur in C) impacts have filled in the plate boundaries essentially turning the process off D) their crusts have dried up and thickened so the crust cannot be broken up into plates
A block of mass m is resting on a ramp making an angle ? with respect to the horizontal. The coefficient of static friction and the coefficient of kinetic friction for this surface are ms and mk, respectively. If the block does not slide, then the frictional force holding the block must be