FUNDAMENTNCEPTS5. A strong boy throws a rock straight up with a force of 100 N. At what rate does the rock initiallyaccelerate upwards, in m/s?? Assume the mass of the rock is 2 kg and the local gravitationalacceleration is 9.74 m/s?.

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Answered: A strong boy throws a rock straight up…

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.31P

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A pump delivers gasoline ( = 685.75 kg/m3) at 20°C and 13.65 m3/h. At the inlet, P1 = 112.5 kPa, z1 = 1.25 m and V1 = 2.75 m/s. At the output, P2 = 555 kPa, z2 = 5 m and V2 = 3.375 m/s. How much power is required if the motor efficiency is 77.5%?
(a) A substance flows through a turbine at the rate of 100 lb./min with ΔKE = 0 and Q = 0. At entry, its pressure is 175 psia, its volume is 3.16 ft.3/lb., and its internal energy is 1166.7 BTU/lb. At exit, its pressure is 0.813 psia, its volume is 328 ft.3/lb., and its internal energy is 854.6 BTU/lb. What horsepower is developed? (b) The same as (a) except that the heat loss from the turbine is 10 BTU/lb. of steam.
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Two chambers, Chamber 1 and Chamber 2 where the pressure at chamber 1 p1=70 kPa, at chamber 2 the pressure p2 = 5kPa. There is an orifice between the two chambers with a diameter of 6 cm, Cc= 1.00, Cv=0.95, and the head of the liquid(s=2.50) over the orifice is 1.80 m. Find the actual flow rate through the orifice. Answers: a.35 L/s b.45L/s c.15 L/s d.25 L/s
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