Ultraviolet rays from the sun are very strong, therefore if direct contact is made with skin, it could cause sun burn, or in a worser case skin cancer
Humans affect the eath by burning fossil fuels
<h3>Explanation</h3>
,
where
is the current;
is the drift speed;
is the cross-section area of the wire, 
is the number of charge carrier per unit volume, and
is the charge on each charge carrier.
Area of a circular cross-section:
,
where
is the radius of the wire.
and are the same for all four samples, for they are made out of the same material.
As a result, of each wire is directly proportional to 
where the value of 
is constant.
For each of the four wires:
.
How do the four wires rank by their current?
d > a > b > c.
Answer:
Explanation:
Point P is situated outside sphere . For a non conducting sphere , electric field outside sphere is given by the relation
E = k Q / d²
15000 = 9 x 10⁹ x Q / .5²
Q = 416.67 X 10⁻⁹
Maximum field will be when d = r ( radius )
maximum E = kQ / r²
= 9 x 10⁹ x 416.67 X 10⁻⁹ / .3²
= 41667 N / C
RADIATION is the transfer of energy as waves moVing through space.
Hope this helps you!
~Autumly
