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Alika [10]
3 years ago
10

WILL MARK BRAINLIEST!!!!!!!!!!!!

Physics
1 answer:
PSYCHO15rus [73]3 years ago
4 0
40 miles/hour

Details:
after one hour they have traveled 40mi. So they have traveled 40mi. in 1hr, or 40mi/1hr or 40mi/hr.

the problem is about reading a graph. the graph says that they traveled 40 miles in the first hour

formula for average speed:
miles traveled/time it took=speed or d/t=r
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A large sheet of charge has a uniform charge density of 9  μCm2. What is the electric field due to this charge at a point just
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Answer:

Explanation:

Surface charge density, σ = 9 μC/m² = 9 x 10^-6 C/m²

According to the Gauss theorem,

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2 years ago
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If a quasar is moving away from us at v/c = 0.8, what is the measured redshift?
Delicious77 [7]

Answer:

The measured redshift is z =2

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Since the object is traveling near light speed, since v/c = 0.8, then we have to use a redshift formula for relativistic speeds.

z= \sqrt{\cfrac{c+v}{c-v}}-1

Finding the redshift.

We can prepare the formula by dividing by lightspeed inside the square root to both numerator and denominator to get

z= \sqrt{\cfrac{1+\cfrac vc}{1-\cfrac vc}}-1

Replacing the given information

z= \sqrt{\cfrac{1+0.8}{1-0.8}}-1

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