Which requires more work, increasing a car's speed from 0 mph to 30 mph or from 50 mph to 60 mph?
1 answer:
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Almost all telescopes have a circular mirror. The area of a circle is proportional to 
where 
is the radius of the circle, the constant of proportionality being 
Therefore the area of 150 meter telescope would be
times bigger than the area of the smaller (10 meter) telescope.
Therefore the area of 150 meter telescope would be
times bigger than the area of the smaller (10 meter) telescope.
Answer:
1 m
Explanation:
L = 100 m
A = 1 mm^2 = 1 x 10^-6 m^2
Y = 1 x 10^11 N/m^2
F = 1000 N
Let the cable stretch be ΔL.
By the formula of Young's modulus
ΔL = 1 m
Thus, the cable stretches by 1 m.