A piston containing 0.30 kg of R-134a at 320 kPa and 130°C is cooled at constant volume until the pressure reaches 200 kPa. What is a good approximation for the final temperature? How much total heat was added to the system? g

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Determine the maximum r-value of the polar equation r =3+3 cos 0

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 .