A force acts on a 3kg particle is in such a way that the position of the particle as a function of time is given by x = 3t - 4t^. What is
the work done by the force during the first 4 seconds?​

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 statement correctly describes the relationship between frequency and wavelength?

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system