1. a one-shell-pass and multiple-of-two tube passes heat exchanger is to be used to cool 12 kg/s of oil with an equal flow rate of water. the heat exchanger area of the heat exchanger is 40 m2. the inlet temperatures of the oil and water are thi = 100 c and tci = 20 c, respectively. the specific heats of the oil and water are 2.09 kj/kg. k and 4.18 kj/kg. k, respectively. the total heat transfer coefficient is controlled by the side and is 1000 w/ m2.k. determine the exit temperature of the oil and water.

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters