Rust forming on iron is an indication of which of the following?

A. atoms are being destroyed

B. A gas is forming

C. a chemical change is occurring

D. matter is being created

Which event is an example of a contact force?

Two oppositely charged parallel metal plates, 1.00 centimeter apart, exert a force with a magnitude of 3.60 * 10^-15 newton on an electron placed between the plates. Calculate the magnitude of the electric field strength between the plates.

Which is the best example of the commercialization of modern sports? A. A school team plays a rival school at baseball. B. A local soccer club makes it to the regional finals. C. Millions of spectators watch the NFL Super Bowl. D.

If the solid form of most molecules is heavier than the liquid form, why does ice float

An archer aims an arrow and then pulls back on the bow string and bends the bow. which describes the relationship of potential and kinetic energy in this case? a.

The sun is 30 degrees above the horizon. it makes a 51 m long shadow of a tall tree. part a how high is the tree?

What can destroy stuff yet does not have any mass

The small piston of a hydraulic lift has a cross-sectional of 3 00 cm2 and its large piston has a cross-sectional area of 200 cm2.

The pressure, temperature and volume of a system change differently during the process of isothermal expansion. Indicate whether each quantity increases, remains constant, or decreases.

Which of the following is true about rows of the periodic table? Atomic mass increases from left to right.