A 4.00-kg block rests between the floor and a 3.00-kg block as shown in the figure. The 3.00-kg block is tied to a wall by a horizontal rope
If the coefficient of static friction is 0.800 between each pair of surfaces in contact, what horizontal force F must be applied to the 4.00-kg block to make it move?
A) 16.2 N
B) 54.9 N
C) 21.1 N
D) 23.5 N
E) 78.4 N
Answer: E
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A toy gyroscope (a.k
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Resolution: With what color light would you expect to be able to see the finest detail when using a microscope?
A. red, because of its long wavelength B. yellow, because of its intermediate wavelength C. blue, because of its shorter wavelength D. The color does not matter.
Gentle tidal interactions are probably necessary to support the formation of _______________ in a galaxy
Fill in the blank(s) with correct word
A segment of wire of total length 3.0 m carries a 15-A current and is formed into a semicircle. Determine the magnitude of the magnetic field at the center of the circle along which the wire is placed.
A. 1.6 ?T B. 4.9 ?T C. 1.0 ?T D. 9.8 ?T E. 15 ?T