A 40-kg box is being pushed along a horizontal smooth surface. The pushing force is 15 N directed at an angle of 15° below the horizontal. What is the magnitude of the acceleration of the crate?
A) 0.16 m/s2
B) 0.36 m/s2
C) 0.47 m/s2
D) 0.39 m/s2
E) 0.68 m/s2
B
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What is the accepted explanation for millisecond pulsars?
What will be an ideal response?
Bohr's model explains the absorption spectrum as the result of:
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The energy difference between adjacent orbit radii in a hydrogen atom
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