A 4.0-kg mass attached to the end of a string swings in a vertical circle of radius 2.0 m. When the string makes an angle of 35° with the vertical as shown, the speed of the mass is 5.0 m/s. At this instant what is the magnitude of the force the string exerts on the mass?
a.
50 N
b.
82 N
c.
89 N
d.
11 N
e.
61 N
b
Physics & Space Science
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Fill in the blank(s) with the appropriate word(s).
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Absolute zero corresponds to a temperature of
A) 0 K. B) -273° C. C) both of these D) none of the above
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Light is refracted through a diamond. If the angle of incidence is 30°, and the angle of refraction is 12°, what is the index of refraction?
a. 1.3 b. 2.4 c. 2.6 d. 1.8 e. 0.4
Physics & Space Science
The person who expounded the uncertainty principle was __________
Fill in the blank(s) with correct word
Physics & Space Science