A tubular sheathed heat exchanger. Water moves in straight pipes with a diameter of 18mm, length of 2.2m, the total number of pipes is 30. The water flow through the device is 24000 kg/h, the water temperature entering the device is 90 degrees, the average surface temperature The inside of the tube is 50 degrees. Determine the thermal capacity of the device.

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.