Answer:
(a) 5142.86 m
(b) 317.5 m/s
(c) 49.3 degree C
Explanation:
m = 100 kg, Q = 1200 kcal = 1200 x 1000 x 4.2 = 504 x 10^4 J
(a) Let the altitude be h
Q = m x g x h
504 x 10^4 = 100 x 9.8 x h
h = 5142.86 m
(b) Let v be the speed
Q = 1/2 m v^2
504 x 10^4 = 1/2 x 100 x v^2
v = 317.5 m/s
(c) The temperature of normal human body, T1 = 37 degree C
Let the final temperature is T2.
Q = m x c x (T2 - T1)
504 x 10^4 = 100 x 4.1 x 1000 x (T2 - 37)
T2 = 49.3 degree C
Answer:work done can be calculated by the following formula;
Explanation:
Speed =distance /time
0.75=30/time
Time=30/0.75=40mins
Answer:
Explanation:
Ike will need to bring positively charged object near one end of the tape, electrons in the tape act like a conductor and will be attracted to the end near the positively charged object. This leaves the other end of the tape positively charged as a result of induction. Therefore, when Ike touch the positive end of the metal rod, electrons from his body will be attracted to the positive rod and transfer onto the rod. When he remove his finger, the rod has more electrons and is will be negatively.
In gas turbine engines, when the gas is compressed, the compression work requirements are negligible. This statement is false. So the correct option is (b).
An example of an internal combustion engine is a gas turbine. In essence, the engine can be thought of as an energy conversion system that transforms fuel energy into mechanical energy that is usable in the form of rotational power.
Since the steady-flow work is proportional to the specific volume of gas turbine engines, the compression work requirements are relatively high. Gases go through four thermodynamic processes in an ideal gas turbine: isentropic compression, isobaric combustion (constant pressure), isentropic expansion, and heat rejection. The Brayton cycle is made up of all of them.
Learn more about turbine engines here:
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