Answer:
C. 10⁻⁷ cm
Explanation:
One nanometer = 10⁻⁹ meter
1 meter = 10² cm
one nanometer = 10⁻⁹ x 10² cm
= 10⁻⁹⁺² cm
= 10⁻⁷ cm .
The light collection of a telescope is proportional to the AREA of the objective lens or mirror. So the 8m collects 4 times as much light as the 4m does in the same time. Or the bigger one collects the same amount of light in 1/4 of the time that it takes the smaller one.
Under the same observing conditions that the 4m needs 3 hours, the 8m monster can do the job in 45 minutes.
Answer:
Nuclear --> Thermal --> Mechanical --> Electrical
Hope this is useful!! :))
Power is the rate of doing work. So, it is expressed as
power = work done/ time
<span>therefore power = force * distance/ time </span>
<span>Power = 9 * 10 / 3 = 30W
Hope this answers the question. Have a nice day.</span>