At a distance of 10 cm from a presumably isotropic, radioactive source, a pair of students measure 74 cps (cps = counts per second). on average, how many counts per second do you expect at a distance of 22 cm? (note that the average number of counts per second need not be an integer.)

In physics the desire of an object to keep doing what it is doing is termed?

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?

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?