Light travels 300,000,000 m/s
1 answer:
Answer:
1 x 10¹⁸cm
Explanation:
Given parameters:
Velocity of light = 300,000,000cm/s
Unknown:
Distance in centimeters = ?
Solution:
To solve this problem,
The velocity of light is 3 x 10⁸m/s
Velocity =
Distance = velocity x time = 3 x 10⁸m/s x 3.2 x 10⁷s
= 9.6 x 10¹⁵m
To cm;
100cm = 1m
Distance = 9.6 x 10¹⁵ x 10² = 9.6 x 10¹⁷cm = 1 x 10¹⁸cm
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Answer:
1. The current will drop to half of its original value.
Explanation:
The problem can be solved by using Ohm's law:
where
V is the voltage across the circuit
R is the resistance of the circuit
I is the current
We can rewrite it as
In this problem, we have:
- the resistance of the circuit remains the same: R' = R
- the voltage is decreased to half of its original value:
So, the new current will be
so, the current will drop to half of its original value.