Number of electrons transferred:
Explanation:
The charge on the first object is
while the charge on the 2nd object is
When they are in contact, the final charge on each object will be
So, the amount of charge (electrons) transferred from the 1st object to the 2nd object is
The charge of one electron is
Therefore, the number of electrons transferred is
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Explanation:
In Europe the standard voltage in homes is 220 V instead of the 120 V used in the United States.
100-W European bulb would be intended for use with a 220-V potential difference.
(a) If V = 220 V and P = 100 W
Power :
If you bring a "100-W" European bulb home to the untied States, what should be its US power rating. So,
or
P = 29.8 watts
(b) Let I is the current will the 100-W European bulb draw in normal use in the United States. So,
Hence, this is the required solution.
Answer: 26.67 m/s
Explanation:
Given
Length traveled by the ball
Time taken to reach the goal post is
Initial velocity
Using the second equation of motion
Now using
The velocity of ball will be 26.67 m/s