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.

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

For which pair of objects would adding the same a

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.