Homework Statement
A gas piston is filled with propane and oxygen at room temperature to a pressure of 1
atm. The surroundings are 1 atm and room temperature. When triggered with a sparking
device, the propane reacts with the oxygen to produce lots of heat. Assume the system is
infinitely...
Homework Statement
A man pushes on a piano with mass 190 {\rm kg} so that it slides at constant velocity down a ramp that is inclined at 15.8^\circ above the horizontal floor. Neglect any friction acting on the piano.
Calculate the magnitude of the force applied by the man if he pushes...
Homework Statement
An adventurous archaeologist crosses between two rock cliffs by slowly going hand-over-hand along a rope stretched between the cliffs. He stops to rest at the middle of the rope . The rope will break if the tension in it exceeds 2.80×10^4 N, and our hero's mass is 91.0 kg...
Homework Statement
A statue is to be 'scaled down.' It will have its size changed without changing its shape. It starts with an initial volume of 4.25 m^3 and ends up with a final volume of 0.250 m^3.
If the height of the original statue was 215 cm, calculate the height of the smaller...
Homework Statement
div(grad f x grad g)=0. I need to prove this somehow.
Homework Equations
The Attempt at a Solution
I don't really know where to even start this at >.< any help is greatly appreciated.