Concave lens. These are used in making the objectives of reflection telescopes
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The answer is C
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Answer:
It increases heart rate and blood pressure, heart problems, dehydration, seizures, and dangerously high blood pressure. (From overconsumption of caffine.)
Explanation:
Explanation:
Power is current times voltage.
P = IV
And from Ohm's law, voltage is current times resistance.
V = IR
So if we solve for I in Ohm's law and substitute into the power equation:
I = V/R
P = (V/R) V
P = V² / R
Given that P = 7 W and V = 7 V:
7 = 7² / R
R = 7 Ω
Make sure you copied the problem correctly. If you did, the answer key may be wrong.
