The students at Alberta Colony School use a pencil sharpener that is attached to the counter. To use the sharpener they turn the crank with a force of 7.5 N. This causes the blades to turn very quickly and with a force of 0.5 N. what is the effort force?

what is the load force?

calculate the mechanical advantage!

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.