Write the energy balance for an adiabatic heat exchanger.
What will be an ideal response?
The equation for an adiabatic heat exchanger is
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Compton Scattering: X-rays with a wavelength of 0.00100 nm are scattered at 130° by free electrons. What is the kinetic energy of each recoil electron? (1 eV = 1.60 × 10-19 J, melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 0.50 MeV B. 0.99 MeV C. 2.0 MeV D. 0.34 MeV E. 0.68 MeV
At higher altitudes it takes ________ time to bring water to a boil on a stove
A) more B) less C) the same
A monkey is sitting at the top of a tree 20 m above ground level. A person standing on the ground wants to feed the monkey. He uses a bow and arrow to launch the food to the monkey
If the person knows that the monkey is going to drop from the tree at the same instant that the person launches the food, how should the person aim the arrow containing the food? Air resistance is small enough to be ignored. A) He should aim it at the monkey. B) He should aim it below the monkey. C) He should aim it above the monkey.
Two charged particles 1 m apart exert a 1-N force on each other. If the particles are instead 0.5 m apart, the force on each particle will be
A) 1.0 N. B) 2.0 N. C) 4.0 N. D) 8.0 N. E) 16.0 N.