1. What volume of foam (lifevest) with a given density will be needed to keep a person, with a given mass and density, 1/3 out of the water?
2. A 20g lead bullet moving at 400m/s strikes a tree. How much will the temperature be raised if 1/2 of the frictional heat goes into the bullet?© BrainMass Inc. brainmass.com March 4, 2021, 6:21 pm ad1c9bdddf
1. Volume of water dispalced is same for two objects.
Volume of person = V1
Density of person = d1
2/3 of his volume is ...
The expert examines frictional heat for volume, density, mass and temperature.