Afirst class lever is used to lift a 500 pound load. if the input arm is 6 feet long, what is the minimum length of output arm that would allow the load to be lifted using only 125 pounds of input force

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

What type of nuclear decay causes the atomic number of an element to increase by 1?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?