Hope this helps.
A.
Hydroelectric is renewable
Biomass is renewable
Solar is renewable
Answer:
The correct option is b) By the time they get to be theories, they cannot be disproven. It's not necessary that the theories are always right. They can be proven wrong.
Explanation:
Answer:
In Celsius:
Explanation:
The formula we are going to use is:
Where:
ε is the emissivity
σ is the Stefan constant
is the final temperature of surrounding surfaces
is the required temperature
is the are of surrounding surface
Calculating The area:
σ=
ε =0.95
=55+273
=328 K
=100 W
In Celsius:
1) Star from the definition of power:
P = work/ time = W / Δt
We know that work is given by force times displacement:
W = F · Δd
Substituting in our formula:
P = F · Δd / <span>Δt
But we know by definition that </span>Δd / <span>Δt = velocity, therefore we can write:
</span>P = F · v
which is the alternative formula saying that Power is equal to Force times Velocity
2) No, it is not a violation of the Law of conservation of energy because as the spring slows down, the kinetic energy is transformed into potential energy and their sum stays constant.
<span> In the Universe , all matter and energy contained; no energy or matter </span>
<span>leaves the Universe. </span>