Which use combustion to release thermal energy? furnaces and heat engines
heat engines and heat pumps
heat pumps and bimetallic coils
bimetallic coils and furnaces

Why don't you see your reflection in water with waves or repples

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

What is the volume of 2400kg of gasoline (petrol) if the density of petrol is 0.7g/km3