A wheel having a moment of inertia of 5.00 kg ? m2 starts from rest and accelerates under a constant torque of 3.00 N ? m for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?
A) 57.6 J
B) 64.0 J
C) 78.8 J
D) 122 J
A
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On a night when a human eye can see a fourth magnitude star, a 60mm telescope, with 100× the surface area as our pupil, would be able to just barely detect
A) ninth magnitude Barnard's Star. B) eighth magnitude Uranus. C) seventh magnitude Titan, Saturn's largest moon. D) eleventh magnitude Tethys, Saturn's second largest moon. E) thirteenth magnitude Pluto.
What energy transformation occurs during photosynthesis?
A) radiant E ? chemical E B) chemical E ? thermal E C) radiant E ? kinetic E D) thermal E ? chemical E E) chemical E ? kinetic E
A car with bad shocks bounces up and down with a period of 1.51 s after hitting a bump. The car has a mass of 1 600 kg and is supported by four springs of force constant k. What is k for each spring?
a. 6.9E+3 N/m b. 1.7E+3 N/m c. 1.7E+3 N/m d. 3.5E+3 N/m e. 8.2E+2 N/m
For Newton's third law, the action and reaction forces are equal in ______________ and opposite in direction
Fill in the blank(s) with correct word