Answer:
Um...
Explanation:
This is what I like to see teachers giving out.
you click the question then it says answer question then u answer it
Answer:
1.) dV/dt = -187200πSin(120πt)
2.) No
3.) -187200
Explanation:
The voltage, V, in volts, in an electrical outlet is given as a function of time, t, in seconds, by the function V=156cos(120πt)
dV/dt = -187200πSin(120πt)
Since the rate of change above is negative, that is, its maximum is negative. definitely, it will never be equal to zero.
The maximum value of the rate of change will be its amplitude, which is
-187200
It would be 72cm bc u need to add up all the line in the back to
Answer:
1.25 cm/day
Explanation:
An air thickness , (l) = 0.15 cm
Air Temperature =
Mass Diffusion coefficient (D) =
If the air pressure
We are to determine how fast will the water level drop in a day.
From the property of air at T = 20° C
from saturated water properties.
The mass flow of can be calculated as:
where:
R(constant) = 8.314 kJ/mol.K
Since 1 mole = 18 cm ³ of water
will be:
Again:
Converting the above value to cm/day: we have:
= 1.25 cm/day
∴ the rate at which the water level drop in a day = 1.25 cm/day