I think the correct answer would be the first option. The elements that hydrogen fuel cells need to produce electricity are oxygen and hydrogen. The hydrogen is broken into protons and electrons with the aid of a catalyst which them reacts with oxygen producing water, heat and electricity.
Answer:
Power = 30 [watts]
Explanation:
Initia data:
F = force = 30[N]
d = displacement = 2 [m]
By definition we know that work is equal to the product of force by the distance displaced
Therefore:
W = F * d = 30 * 2
W = 60 [J]
And power is defined as the amount of work done in a given time interval
time = t = 2 [sec]
Power = W / t
Power = 60 / 2
Power = 30 [W]
Answer:
A kid becoming an adult
A leg becoming bruised
A person's blood pressure raising because they are running
need a picture to answer specific questions.
Explanation:
All of these are physical changes. Hope that this helps you and have a great day :)
Answer:
The force downward acting o the rocket is F=m*g=0.0782kg*9.8m/s^2=0.76636 N
Explanation:
Hello. This question is incomplete. The full question is:
Two blocks are stacked on top of each other on the floor of an elevator. For each of the following situations, select the correct relationship between the magnitudes of the two forces given.
The elevator is moving downward at a constant speed.
The magnitude of the force of the bottom block on the top block is _____ the magnitude of the force of the earth on the top block.
Answer:
The magnitude of the force of the bottom block on top block is equal to the magnitude of the force of the top block on bottom block.
Explanation:
As the elevator is descending, there is only a normal force being applied to the lower surface of the block. This force has a magnitude equal to the force of the upper block, because the only acceleration that is acting in this case is the force of gravity. From that force, the resulting force is zero.
