What is the instantaneous acceleration of the object at time = 9.5 seconds? −20 m/s2 0 m/s2 20 m/s2 −10 m/s2

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Which subatomic particle has a negative charge