2. Which marble could have more mechanical energy? (sitting on flat plane)

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

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?