Answer:
The potential difference across the resistor is 250 volts.
Explanation:
The potential difference across the ends of the resistor is given by
where is the current through the resistor and
is is its resistance.
Now, in our case
,
;
therefore, the potential across is
Answer:
T = 99.51 hour
Explanation:
Mass of Uranus,
The moon Umbriel orbits Uranus at a distance of
We need to find Umbriel's orbital period. Let it is T. Using Kepler's third law of motion to find it.
As 1 hour = 3600 s
358244.51 s = 99.51 hour
Hence, Umbriel's orbital period is 99.51 hour.
Answer:
A) 12P
Explanation:
The power produced by a force is given by the equation
where
W is the work done by the force
T is the time in which the work is done
At the beginning in this problem, we have:
W = work done by the force
T = time taken
So the power produced is
Later, the force does six times more work, so the work done now is
And this work is done in half the time, so the new time is
Substituting into the equation of the power, we find the new power produced:
So, 12 times more power.