Stop simultaneously using method of your choice 5v+2w=31,3v-4w=3​

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 ?

If the new moon happens on january 15th, what shape will it be on february 6th?

The energy released by a nuclear fusion reaction is produced when