Steam enters a well-insulated turbine operating at steady state at 4 mpa with a specific enthalpy of 3015.4 kj/kg and a velocity of 10 m/s. the steam expands to the turbine exit where the pressure is 0.07 mpa, specific enthalpy is 2500 kj/kg, and the velocity is 90 m/s. the mass flow rate is 30 kg/s. neglecting potential energy effects, determine the power developed by the turbine, in kw.

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c

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 .