Why isn't iron used to make coin

You have a rock with a volume of 15 cm 3 and a mass of 45 grams. What is its density?

How is the structure of a unicellular organism different than the structure of a multicellular organism? How does this effect the function

If 12 atoms of hydrogen enter into a chemical reaction how many atoms of hydrogen must come out of the reaction

A ray of green light has a frequency of 5.34*10^-7 m. What is the wavelength? (Hint: remember the speed of light!)

Note: Take East as the positive direction. A (n) 81 kg fisherman jumps from a dock into a 136 kg rowboat at rest on the West side of the dock. If the velocity of the fisherman is 3.

A 0.125 kg frozen hamburger patty has two forces acting on it that determine its horizontal motion. A 2.30 N force pushes it to the left, and a. 800 N force pushes it to the right. (a) taking right to be positive, what is the net force acting on it.

If the same net force is applied to a 7kg

Sentences and facts for the laws of motion.

What is the minimum force required to life a 50-N load with one fixed pulley?'

Why are logarithmic scales useful in earth science?