When iron is exposed to oxygen it rusts or oxidizes. Which of these represents the balanced equation for this chemical change?

A) Fe + O → FeO

B) FeO → Fe + O

C) Fe + O2 → Fe2O3

D) 4Fe + 3O2 → 2Fe2O3

A 300-gram toy car and a 500-gram toy car are sitting on a shelf that is 2 meters highter than the floor. by what percent is the PE of the 500-gram car grater than the PE of the 300-gram car?

How to use proton, neutron, and isotope in a sentence

In a diagram depicting the solar system as heliocentric, what is located at the center?

A boxer punches a sheet of paper in midair from rest to a speed of 40 m/s in 0.05 s. If the mass of the paper is 0.01 kg, the force of the punch on the paper is?

What is the spring constant (in n/m) of a spring that stores 100 J of elastic potential energy when it is stretched 5 m?

This particle is found in the nucleus and adds mass to the nucleus, but changing its number does not change what the element is. This particle is the A. proton. B. photon. C. neutron. D. electron.

Projectile motion is an example of what kind of motion

What can change scientific knowledge?

6. What is ductility?

During practice, a baseball player hits a very high fly ball, and then runs in a straight line and catches it. Which had the greatest displacement during the time period from the hitting of the ball to its catching