You are now operating a carnot engine at 40% efficiency, which exhausts heat into a heat sink at 298 k. if you want to increase the efficiency of the engine to 65%, to what temperature would you have to raisethe hot reservoir?

To run the physics cart, the fan speed of the cart is manipulated. this is the (blank) variable. the cart accelerates due to the speed of the fan. acceleration is therefore the (blank) variable. a “constant” is a parameter that stays the same regardless of the variables. one parameter of the cart that is held constant is the (blank) .

An object's buoyant force and weight mean the same thing.a. trueb. false

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.