The angular velocity of a wheel is given by ?(t) = (2.00 rad/s2)t + (1.00 rad/s4)t3
(a) What is the angular displacement of the wheel from time t = 0.00 s to time t = T?
(b) What is the angular acceleration of the wheel as a function of time?
(a) (1.00 rad/s2 )T2 + (0.250 rad/s4 )T4
(b) (2.00 rad/s2 ) + (3.00 rad/s4 )t2
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What was the significance of the end of the era of nucleosynthesis, when the universe was about 5 minutes old?
A) The basic chemical composition of the universe had been determined. B) The proportions of dark matter and luminous matter had been determined. C) It marks the time at which the first stars formed. D) It marks the time at which the expansion of the universe had settled down to its current rate.
Metal lids on glass jars can often be loosened by running them under hot water. Why is this?
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The latent heat of vaporization of water is roughly 10 times the latent heat of fusion of water. The amount of heat required to boil away 1 kg of water is __________ the amount of heat required to melt 1 kg of ice
a. one tenth b. equal to c. 10 times d. unrelated to
In Figure 5.14, the mass of block C is closest to:
A) 5 kg B) 7 kg C) 9 kg D) 11 kg E) 13 kg