Aheat engine uses thermal energy that flows from a heat source with a temperature of 325 k to a cold sink, which has a temperature of 135 k. what is the efficiency of the heat engine? the answer should have three significant figures

What is an aquifer for science class

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?