Gravity pulls downward on a rock with a force of 800 N. If you pull upward on the rock with a force of 400 N, what is the total force acting on the rock?

A. 400 N downward

B. 400 N upward

C. 1200 N downward

D. 1200 N upward

A hollow steel ball weighs 1 kilogram. What must its volume be for it to float in water

3 forces that you exert when riding a bike

Which part of the flower is the male reproductive organ

Lowest energy positon of an electron in an atom

A fisherman is watching water waves ripple past his boat. How could he determine the wavelength of the water waves?

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)