Acounterflow double-pipe heat exchanger is used to heat water from 20 to 40◦c by cooling an oil from 90 to 55◦c. the exchanger is designed for a total heat transfer of 59 kw with an overall heat-transfer coefficient of 340 w/m2 · ◦c. calculate the surface area of the exchanger.

Research the neutrino using the internet and report your findings. in a nuclear decay, the nucleus of an atom splits apart. larger particles can be detected and their masses and velocities can be recorded. explain how the existence and properties of the neutrino could be predicted using the conservation laws.

Arock collection comes from which part of earth?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?