We are able to define a mechanical equivalent for heat because
a. some thermal energy can be converted into mechanical energy.
b. mechanical energy can be converted into thermal energy.
c. work can be converted into thermal energy.
d. some thermal energy can be converted into work.
e. all of the above can occur.
e
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Suppose that you were selected for a "Survivor"-type TV show. To help keep your group connected, you suggest that long vines can be tied together and used to transmit signals in cases of emergency. To get the signals to travel faster, you should
A. select lighter vines. B. increase the tension on the vines. C. hang weights from the vines at evenly spaced intervals. D. do all of the above. E. do (a) or (b) above, preferably both.
Which of the following steels has the highest hardenability?
(a) 1050 (b) 1080 (c) 4320 (d) 4340
A car is being towed at constant velocity on a horizontal road using a horizontal chain. The tension in the chain must be equal to the weight of the car in order to maintain constant velocity
A) True B) False
The captain orders his starship to accelerate from rest at a rate of "1 g" (1 g = 9.8 m/s2). How many days does it take the starship to reach 10% the speed of light? (Light travels at 3.0 × 108 m/s.)
a. 5 days b. 11 days c. 14 days d. 28 days e. 35 days