A 50 kg ice skater moving at 5 m/s collides with a second stationary skater with mass 70 kg. The skaters cling together after the collision and move without friction. Compute their speed after the collision.(3 sig figs)

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

Diamond will scratch quartz. true or false

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z