Acar converts the chemical energy of gasoline to the mechanical energy of motion. the total energy of motion is less than the total energy stored in the gasoline. evidence that energy is still conserved, however, is found in which of the following observations?
a) the mass of the moving object, the car, is greater than that of the gasoline
b) the energy in the gasoline was extracted from crude oil, which had more energy.
c) some of the energy of the gasoline is also converted to heat and sound energy.
d) not all car engines are equally efficient at this energy transformation.

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

The particles that are found in the nucleus of an atom are

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.