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.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

The force it would take to accelerate an 900-kg car at the rate of 6m/s2