A75.5-kg person puts on a life jacket, jumps into the water, and floats. the jacket has a volume of 3.38 x 10-2 m3 and is completely submerged under the water. the volume of the person's body that is underwater is 6.42 x 10-2 m3. what is the density of the life jacket?

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

What was the first instrument to ever record an earthquake?