The weight of an object above Earth varies inversely as the square of its distance from the center of Earth. If an astronaut in a space vehicle weighs 57 pounds when 6700 miles from the center of Earth, what does the astronaut weigh when 4090 miles from the center?

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.