In a closed system, the kinetic energy plus the potential energy is a constant
a. True
b. False
Indicate whether the statement is true or false
True
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A block is pushed up a frictionless 30° incline by an applied force as shown. If F = 25 N and M = 3.0 kg, what is the magnitude of the resulting acceleration of the block?
A. 2.3 m/s2 B. 4.6 m/s2 C. 3.5 m/s2 D. 2.9 m/s2 E. 5.1 m/s2
The site from which an airplane takes off is the origin. The x axis points east; the y axis points straight up. The position and velocity vectors of the plane at a later time are given by
?
.
?
The magnitude, in meters, of the plane's displacement from the origin is
A. 9.14 × 103. B. 1.61 × 104. C. 1.84 × 104. D. 9.14 × 103t. E. 1.61 × 104t.
How wide must a narrow slit be if the first diffraction minimum occurs at ±12° with laser light of 633 nm?
A. 3.0 × 10?6 m B. 3.0 × 10?5 m C. 6.1 × 10?6 m D. 6 .1× 10?5 m E. 1.5 × 10?6 m
An excited atom can lose energy by emitting a __________
Fill in the blank(s) with correct word