Which of these properties is the best measure of a star's brightness? (1 point)
1 answer:
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Answer:
Truck will be at a distance of 720 m
Explanation:
Speed of the truck is given as 90 m/sec
Time for which truck travel t = 10 seconds
We have to find the distance that how much truck travel in 8 sec with speed of 90 m/sec
We know that distance is given by
So distance traveled by truck in 8 sec will be equal to
So truck will be at a distance of 720 m
Answer:
<h3>(A) The widthExplanation:
Given :
Focal length
Maximum aperture
Wavelength m
(A)
From rayleigh criterion,
rad
From angle formula,
Where 12 m ( given in example )
m
m
(B)
We know that is proportional to the
and inversely proportional to the
so we write the new width, here is 5.5 times larger than above case
m