Water at 70ºC flows through a 1 cm inside diameter tube at 6 kg/min. If the water is to be cooled by passing through the tube, what is the flow and thermal entrance length?
What will be an ideal response?
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An optical telescope is able to resolve blue objects better than red objects.
Answer the following statement true (T) or false (F)
One phenomenon that supports the quantum theory of radiation is
A) the transference of energy by a light beam. B) the tiny flashes when a light beam strikes a screen. C) interference effects with light. D) the tiny flashes when an electron beam strikes a screen. E) None of the above.
A double-slit experiment uses coherent light of wavelength 633 nm with a slit separation of 0.100 mm and a screen placed 2.0 m away
(a) How wide on the screen is the central bright fringe? (b) What is the distance on the screen between first-order and second-order bright fringes? (c) What is the angular separation (in radians) between the central maximum and the first-order maximum?
An external heat source supplies heat to a system at a rate of 187 W as the system does work at a rate of 131 W. At what rate is the internal (thermal) energy of the system changing?
A) 320 W B) 56 W C) 190 W D) -56 W E) -320 W