Answer: 
Explanation:
The frequency 
of an electromagnetic wave is given by the following equation:
Where:
is the speed of light in vacuum
is the frequency of red light
is the wavelength of red light
Isolating :
Finally:
the new momentum would be 40000 units as momentum = mass × velocity
= (3,760 joule/sec) / (4,000 joule/sec)
= 3,760 / 4,000 = 0.94 = 94%
Answer:
It is impossible...
Explanation:
Under no circumstances this is possible because of the Newton’s 1st law of motion that states that a body shall continue its motion forever except the net fore is zero. When two opposing forces contract each other, they cancel out the action of each other and ultimately the net force become zero. If one body has a slightly more or less force then the net force will not be zero and the net magnitude of force will have a direction of motion.
Answer:
e_12=1-Tc/Th
This is same as the original Carnot engine.
Explanation:
For original Carnot engine, its efficiency is given by
e = 1-Tc/Th
For the composite engine, its efficiency is given by
e_12=(W_1+W_2)/Q_H1
where Q_H1 is the heat input to the first engine, W_1 s the work done by the first engine and W_2 is the work done by the second engine.
But the work done can be written as
W= Q_H + Q_C with Q_H as the heat input and Q_C as the heat emitted to the cold reservoir. So.
e_12=(Q_H1+Q_C1+Q_H2+Q_C2)/Q_H1
But Q_H2 = -Q_C1 so the second and third terms in the numerator cancel
each other.
e_12=1+Q_C2/Q_H1
but, Q_C2/Q_H2= -T_C/T'
⇒ Q_C2 = -Q_H2(T_C/T')
= Q_C1(T_C/T')
(T1 is the intermediate temperature)
But, Q_C1 = -Q_H1(T'/T_H)
so, Q_C2 = -Q_H1(T'/T_H)(T_C/T') = Q_H1(T_C/T_H) So the efficiency of the composite engine is given by
e_12=1-Tc/Th
This is same as the original Carnot engine.
