Distance to NYC: How far is 100 miles, in kilometers
1 answer:
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Answer:
24.3 m
Explanation:
Using the equation of motion
where s is the distance, u is initial velocity, t is time and a is acceleration
Substituting u for 6 m/s, t for 3 s, a for 1.4 m/s2 we obtain
Answer:
The power dissipated is reduced by a factor of 2
Explanation:
The power dissipated by a resistor is given by:
where
I is the current
R is the resistance
by using Ohm's law, , we can rewrite the previous equation in terms of the voltage applied across the resistor (V):
In this problem, the resistance of the element is doubled, while the voltage is kept constant. So we have while V remains the same; substituting into the formula, we have:
so, the power dissipated is reduced by a factor 2.