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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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.
An optical telescope is able to resolve blue objects better than red objects.
Answer the following statement true (T) or false (F)
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