The electric output of a power plant is 800 MW . Cooling water flows through the power plant at the rate 0.900 ×108L/hr. The cooling water enters the plant at 13.0ºC and exits at 26.0ºC .

What is the power plant's thermal efficiency?

thanks

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .