From the gravitational law calculate the weight w (gravitational force with respect to the earth) of a 67-kg man in a spacecraft traveling in a circular orbit 263 km above the earth's surface. express w in both newtons and pounds.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is