Answer:
2.8 %
Explanation:
Power deliver by the cell = 4.2 x 10^-3 W
Power given to the cell = 0.15 W
The efficiency of the cell is defined as the ratio of power deliver by the cell to the power given to the cell.
So, the efficiency of the cell
= power deliver by the cell / power given to the cell
=
= 0.028
in percentage form = 0.028 x 100 % = 2.8 %
Thus, the efficiency of the photo voltaic cell is 2.8 %.
Answer:
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Explanation:
The mass of the water with the sugar dissolved in it is 55 grams. This is because when you add the weight of the water, and the sugar that you added, it is 55.
Metabolism........I think
Answer:
Average speed is 14 m/s and average velocity is 10 m/s.
Explanation:
The time consumed to travel from A to B = Distance / Speed = 30 / 10 = 3 seconds
The time consumed to travel from B to C = Distance / Speed = 40 / 20 = 2 seconds
Now, we find the average speed by using the below formula.
Average speed = total distance / total time
Average speed = (30 +40) / (3 + 2)
Avergae speed = 70 / 5 = 14 m/s.
Now find the average velocity.
Average velocity = displacement / time
Displacement, distance between A to C = [(30)^2 + (40)^2]^1/2 = 50 m
Average velocity = 50 / (3+2) = 10 m/s