Answer: The outer surface temperature is .
Explanation:
Given: Heat = 3 kW (1 kW = 1000 W) = 3000 W
Area = 10
Length = 2.5 cm (1 cm = 0.01 m) = 0.025 m
Thermal conductivity = 0.2 W/m K
Temperature (inner) =
Formula used is as follows.
where,
K = thermal conductivity
A = area
L = length
= inner surface temperature
= outer surface temperature
Substitute the values into above formula as follows.
Thus, we can conclude that the outer surface temperature is .
Answer:
Starting current
Explanation:
The motor branch circuit short circuit and ground-fault protective device shall be capable of carrying the <u>Starting current</u> of the motor.
Answer:
When y = 0.25 ft, velocity gradient = -6 ft/s
When y = 0.5 f, velocity gradient = -1.5 ft/s
Explanation:
Given;
equation for the velocity profile, 3/2 = 4yv
Rearrange this equation, you will get;
When y = 0.25 ft
When y = 0.5 ft
Answer:
763.94Wh
Explanation:
If the load is 120 watts running for 4 hours per night, the energy consumed is
120*4 =480 Wh
So, the energy gathered by the PV array is
E=480/(77%*96%*85%)=763.94Wh