Explanation:
It is given that,
Mass of the box, m = 10 kg
Force with which the box is pulled, F = 50 N
It is moved a distance of 4 m
Force of friction acting on the box, f = 20 N
We need to find the initial kinetic energy the box have. It is clear that the box is at rest initially. As there is no motion in the box at that time. The formula for the kinetic energy of the box is given by :
As v = 0
So, the initial kinetic energy of the box is 0. Hence, this is the required solution.
Answer:
e) half
Explanation:
as we know relation b/w charge(Q) , capacitance (C) and voltage (V) is
Q = CV ...........(i)
we also know capacitance of a capacitor for separation d and area A is
C = ∈₀A/d ...........(ii)
from the above equation it is clear that C is inversely proportional to separation if separation doubled capacitance will reduced to half and from equation first charge is directly proportional to capacitance.
that s why magnitude of charge will reduced to half
so option (e) is right answer
A, hope this helped! I didn’t really get it but I think it’s correct?
The answer is latitude. Think a bout the different time zones and how the farther you go west, the earlier it will be. For Example, if you go past Memphis TN into Arkansas, you will be an hour behind the east coast.
Answer:
The electric power generated by the wind turbine is 1105.84 kWh
The amount of electric energy generated is 26540.17 kWh
The revenue generated per day is $2388.62
Explanation:
Consider a wind turbine with a blade
Span diameter of 100 m installed at a site
subjected to steady winds at 8 m/s
l.e wind speed v = 8 m/s
Span diameter d = 100 m
A, sweap area = πd² / 4
= π x 100² / 4
= 7853.98 m²
Lets solve for wind speed v = 8 m/s
Density of Area ρ = 1.25 kg/m³
η = 44%
P = 1/2 ρAv³η
= 1/2 x 1.25 x 785.98 x 8³ x 44/100
= 1/2 x 1.25 x 7853.98 x 512 x 0.44
= 1105840.38
= 1.10584038 mw
= 1105.84038 kWh
= 1105.84 kWh
Energy generated by wind turbine per day
⇒ P x H
= 1105.84038 x 24
= 26540.16912 kwh
= 26540.17 kwh
Revenue generated per day = Energy x 0.09 kwh
= 26540.16912 x 0.09
= $2388.615
= $2388.62