Asolid sphere of radius r rotates about a diameter with an angular speed ω. the sphere then collapses under the action of internal forces to a final radius r/2. what is the final angular speed of the sphere

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?