What impulse occurs when an average force of 7.0 n is exerted on a cart for 2.5 s ?

express your answer to two significant figures and include the appropriate units.

Plss anybody know how to do this? ? i need the answers from a through d

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?

When an object is heated it contracts. a. true b. false