Answer:
Speed Unchanged.
Explanation:
As work is defined as a product of force over a distance. If the distance in altitude is constant = 500km, there's 0 change in distance and force, no work would be done by the gravitational force.
Since potential energy of the satellite is unchanged, unless there's additional internal energy source, the kinetic energy would remain unchanged, so would its speed.
See attachment file below.
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Answer:
Damage from UV exposure is cumulative and increases your skin cancer risk over time. While your body can repair some of the DNA damage in skin cells, it can't repair all of it. The unrepaired damage builds up over time and triggers mutations that cause skin cells to multiply rapidly. That can lead to malignant tumors.
2.5 C coulombs of charge are carried by the test charge.
<h3>What is test charge?</h3>
A test charge is a charge of such a modest size that it has little impact on the field surrounding the site where it is placed. To determine the strength and direction of an electric field, a positive test charge is a unit positive charge.
U = qV
where,
U = 10 j
V = 4V
then, q = U/V
q = 10/4
q = 2.5 C
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