Constants
black hole gravitational force a black hole exerts a 60-
n gravitational force on a spaceship. the black hole is
1014 m from the ship.
part a
what is the magnitude of the force that the black
hole exerts on the ship when the ship is one-half
that distance from the black hole? (hint: one-half of
1014 m is not 10 m].
express your answer to two significant figures
and include the appropriate units.
f
12.10-12 n

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.