A well-insulated shell-and-tube heat exchanger is used to heat water (cp = 4.18 kJ/kg·°C) in the tubes from 20°C to 70°C at a rate of 4.5 kg/s. Heat is supplied by hot oil (cp = 2.30 kJ/kg·°C) that enters the shell side at 170°C at a rate of 10.8 kg/s. Determine the rate of heat transfer in the heat exchanger and the exit temperature of oil.

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

Awalk up the phase change graph worksheet

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s