19. A stone dropped from a cliff hits the ground 3.5 seconds later. A second rock is thrown horizontally from the same cliff and lands 24.5 meters from the base.
a. Find the height of the cliff
b. Find the initial velocity of the thrown rock

If you want to change the pitch of a sound, you have to change the

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

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?