10. John does 176 J of work lifting himself a distance of 0.40 m. How much force must John apply to accomplish this?
O 440 m
O 440 J
O 440 N
O 70.4 J

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)