Which of the following accurately describes the differences between the si and english system of measurement

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?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c