Energy and Mass: Consider a student whose mass is 70 kg. If all his mass were converted to electrical energy, for how many years could he keep a 100-W light bulb burning? (c = 3.0 × 108 m/s)
What will be an ideal response?
6.3 × 1016 s = 2.0 billion years!
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The motion of a piston in an auto engine is simple harmonic. If the piston travels back and forth over a distance of 10 cm, and the piston has a mass of 1.5 kg, what is the maximum speed of the piston and the maximum force acting on the piston when the engine is running at 4 200 rpm?
The theory of seafloor spreading is attributed to
A) Harry Hess. B) Marie Tharp. C) Alfred Wegener. D) Richard Oldham.
Shapley correctly argued that the rotation of the spiral nebulae proved they could not be very distant
Indicate whether the statement is true or false
On a PV diagram, 2 curves are plotted, both starting at the same point (P1, V1) and both ending at the same increased volume (V2). One curve is for an isothermal process; the other is for an adiabatic process. Except for the common starting point, which curve is the upper one?
a. The isothermal process curve will always be the upper one. b. The adiabatic process curve will always be the upper one. c. Since they start at the same point and end at the same volume, they will coincide. d. The isothermal one will start out higher, but the adiabatic one will eventually cross it.