The angular velocity of a 755-g wheel 15.0 cm in diameter is given by the equation ?(t) = (2.00 rad/s2)t + (1.00 rad/s4)t3
(a) Through how many radians does the wheel turn during the first 2.00 s of its motion?
(b) What is the angular acceleration (in rad/s2) of the wheel at the end of the first 2.00 s of its motion?
What will be an ideal response?
Answer: (a) 8.00 rad (b) 14.0 rad/s2
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A. 4.9 × 107 m2 B. 1.3 × 1014 m2 C. 2.6 × 1014 m2 D. 5.1 × 1014 m2
Avogadro's number has a numerical value of
a. 6.02 × 10^23. b. 1.00 × 10^23. c. 3.01 × 10^23. d. none of these.
Who won the Nobel Prize for explaining the photoelectric effect?
a. Bohr b. Planck c. de Broglie d. Einstein
A 4.00 kg solid sphere (I = 2/5 
) is spinning with an angular velocity of 23.0 rad/s. The diameter of the sphere is 20.0 cm. The angular kinetic energy of the spinning sphere is
A. 3.02 J. B. 3.52 J. C. 3.75 J. D. 4.02 J. E. 4.23 J.