Answer:
The temperature of the steam during the heat rejection process is 42.5°C
Explanation:
Given the data in the question;
the maximum temperature T
in the cycle is twice the minimum absolute temperature T
in the cycle
T = 0.5T
now, we find the efficiency of the Carnot cycle engine
η
= 1 - T/T
η = 1 - T/0.5T
η = 0.5
the efficiency of the Carnot heat engine can be expressed as;
η = 1 - W
/Q
where W is net work done, Q is is the heat supplied
we substitute
0.5 = 60 / Q
Q = 60 / 0.5
Q = 120 kJ
Now, we apply the first law of thermodynamics to the system
W = Q - Q
60 = 120 - Q
Q = 60 kJ
now, the amount of heat rejection per kg of steam is;
q = Q/m
we substitute
q = 60/0.025
q = 2400 kJ/kg
which means for 1 kilogram of conversion of saturated vapor to saturated liquid , it takes 2400 kJ/kg of heat ( enthalpy of vaporization)
q = h
= 2400 kJ/kg
now, at h = 2400 kJ/kg from saturated water tables;
T = 40 + ( 45 - 40 ) ( 
)
T = 40 + (5) × (0.5)
T = 40 + 2.5
T = 42.5°C
Therefore, The temperature of the steam during the heat rejection process is 42.5°C
Answer:
<h3>75m</h3>
Explanation:
If a cat walk 100m East, this means that it is walking in the positive x direction, the distance will therefore be +100m
If it turns around and walks 25 m west, the direction of movement is in the negative x direction i.e -25m
Taking the sum;
Displacement = +100m - 25m
Displacement of the cat = 75m
hence the cats displacement is 75m
Answer:
When the electrical current passes through the conductors, the polarity is changed, and the diaphragm interacts with the permanent magnets, vibrating and creating sound.
Explanation:
Answer:
Explanation:
Given:
- file size to be transmitted,
- transmission rate of data,
- propagation speed,
- distance of data transfer,
<u>Now the delay in data transfer from source to destination for each 10 Mb:</u>
<u>Now this time is taken for each 10 Mb of data transfer and we have 30 Mb to transfer:</u>
So,
Answer:
7.37 N/m
Explanation:
Given:
Mass of the object = 4.70 g = 0.0047 kg
acceleration = 0.800 g = 0.800 × 9.81 = 7.848 m/s²
Displacement = 0.500 cm = 0.005 m
Now,
Force by the object = Mass × Acceleration
= 0.0047 × 7.848
= 0.0368856 N
and,
Force by the spring = kx
where, x is the displacement
k is the spring constant
thus,
0.0368856 = k × 0.005
or
k = 7.37 N/m
