The mass is m = 3kg
The acceleration is a = 2m/s/s
Force is equal to mass times acceleration
F = m*a = 3kg*2m/s/s = 6 N
This force is equal to the tension in the string
T = 6 N
<span>The correct answer is: (D) Generator
Explanation:
In wind-powered systems, the wind energy turns the blades around the rotor of a wind turbine. That rotor is connected to a generator that generates electricity. In other words, the kinectic energy of the wind is converted into electrical energy by using the generator in the wind-powered systems.</span>
Answer:
23 J
Explanation:
According to the law of conservation of energy, the total heat given off to the surroundings by a refrigerator is equal to the work done by the refrigerator and the heat removed from the inside of the refrigerator.
So we can write:
where
is the heat removed from the cold reservoir (the inside of the refrigerator)
W is the work done
is the work released into the hot reservoir (the surroundings)
Here we have:
(heat removed from the inside of the refrigerator)
(heat released into the surroundings)
Solving the equation for W, we find the work done:
Answer:
the correct option is C
Explanation:
The intensity of a lamp depends on the power of the lamp that is provided by the current flowing over it, therefore the intensity would increase if we raise the current.
Another way to increase the intensity is to decrease the area with a focusing lens, as the intensity is power over area, decreasing the area increases the power.
When we see the possibilities we see that the correct option is C
Answer:
9:36 and how far it will travel is 26 minutes
