Aproton is positively (+1) charged particle and the mass 1.6727 x 10-^24 g
a neutron is a neutral (0) particle and the mass is 1.6750 x 10^-24 g

The sub-atomic particles of an atom are the proton, electron and the neutron. An electron has a charge of -1 and a smaller mass than a proton. Proton has the same mass with the neutron. The ratio between the mass of a proton and an electron is about 2000. An electron has an equal value but negative charge with the proton.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;