On an ice rink, two skaters of equal mass grab hands and spin in a mutual circle once every 2.9 s . If we assume their arms are each 0.85 m long and their individual masses are 61.0 kg , how hard are they pulling on one another?
Express your answer to two significant figures and include the appropriate units.

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c.take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface, what is its volume?

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground

The force it would take to accelerate an 900-kg car at the rate of 6m/s2