Given: The mass of stone (m) = 0.5 kg
Raised from heights (h₁) = 1.0 m to (h₂) = 2.0 m
Acceleration due to gravity (g) = 9.8 m/s²
To find: The change in potential energy of the stone
Formula: The potential energy (P) = mgh
where, all alphabets are in their usual meanings.
Now, we shall calculate the change in potential energy of the stone
Δ P = P₂ - P₁ = mg (h₂ - h₁)
or, = 0.5 kg ×9.8 m/s² ×(2.0 m - 1.0 m)
or, = 4.9 J
Hence, the required change in the potential energy of the stone will be 4.9 J
False , because mass is the amount of matter contains
The question is asking to compute the annual cost of electricity to power a lamp post for 7.5 hrs per day with the following power, and base on my calculation, the answers would be the following:
#1. 7,580,769.23
#2. 1,895,195.31
I hope you are satisfied with my answer and feel free to ask for more if you have questions and further clarifications.
Answer:
Choice A.
Nearness to a body of water causes an increase in humidity, due to the higher rate of evaporation.
The north and south forces have no effect on the east and west forces.
We can handle the two groups separately.
(20N south) + (30N north)
= (20N south) + (20N north + 10N north)
= 10N north .
(40N east) + (50N west)
= (40N east) + (40N west + 10N west)
= 10N west .
