Answer:
Expression for output voltage = V = Vo sin wt
Explanation:
Amplitude of output voltage = Vo = 19 V
Frequency = f = 240 Hz
Now we know that
Angular frequency = w = 2 π (1 / T) = 2 π 240 = 480 π Hz
Expression for output voltage = V = Vo sin wt
Expression for output voltage = V = 19 (sin 480 π) t
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Answer:
Explanation:
Given that;
Thermal diffusivity 
Thermal conductivity 
Heat transfer coefficient h = ( we are to assume the imposed surface temperature ) = 20 W/m².K
Initial temperature = 150 ° C = (150+273) K = 423 K
Then coolant temperature with which the casting is exposed to = 20° C = (20+273)K = 293 K
Time = 40 seconds
Length = 20mm = 0.02 m
The objective is to determine the temperature at the surface at a depth of 20 mm after 40 seconds.
Bi == 0.02
For a wall at 0.2 Bi
Therefore;
Answer:
Efficent at low speeds.
Explanation:
Since water is 1,000 times more dense than air, electricity can generated from tides much more efficiently at slower speeds than wind turbines can.
