ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are
measurements.
An object moves in uniform circular motion at 50 m/s and takes 1.0 second to go a quarter circle. Calculate the
centripetal acceleration.
m/s2
160
78

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

What is the coefficient of kinetic friction μk between the block and the tabletop?