From which of the following do spiral galaxies form?
a. high-density proto-galactic clouds
b. rapidly spinning proto-galactic clouds
c. colliding/merging proto-galactic clouds
d. rapidly cooling proto-galactic clouds

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

The slope of a velocity time graph over any interval of time gives the during that interval

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.