What is the difference between human made disasters and natural disasters?

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Which of the following is not a physical property of mattera. melting pointb. heat of combustionc. viscosityd. boiling point

Amaterial that provides resistance to the flow of electric current is called a(an) (1 points)