How can you find the net force if two forces act in opposite direction?

What is the mass of an object that weighs 720 N on the surface of the earth?

What is the central core of hair

A helium-neon laser emits a beam of circular cross section with a radius r and a power P.?. (a) Find the maximum electric field in the beam. (Use any variable or symbol stated above along with the following as necessary: μ0 and c ...

Which of these causes physical weathering? A) wind B) glaciation C) freezing temperatures

A 40 kg-skier starts at the top of a 12-meter high slope. At the bottom, she is traveling 10 m/s. How much energy does she lose to friction? A. She doesn't lose any because mechanical energy is always conserved. B. 4,704 J C. 2,000 J D. 2,704 J

When energy is converted from one form to another in a chemical or physical change, which of the following also changes by a measureable amount? Select the correct answer below: a. The total mass in the system b. The force of gravity c.

Which of the following is not a result or consequence of rising average air temperatures on Earth? Glaciers and ice sheets melt. Sea levels rise. Evaporation increases. Salinity increases.

How does the doppler effect explain differences in sound pitch? choose all that apply?

A generator converts

The standard international unit of measurement S I for mass is the what