The mass of a book made of 144 pages is 508 grams. Calculate the mass of one page knowing that the cover's mass is 220 grams.

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 are similarities and differences of reflection, refraction, diffraction and absorption?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse