The radius of a nucleus of hydrogen is approximately
, while we can use the Borh radius as the distance of an electron from the nucleus in a hydrogen atom:
The radius of a dime is approximately
: if we assume that the radius of the nucleus is exactly this value, then we can find how far is the electron by using the proportion
from which we find
So, if the nucleus had the size of a dime, we would find the electron approximately 500 meters away.
Yes, eg., when 2 bodies move in opposite directions
, the relative velocity of each is greater than the individual velocity of either
Answer:
Explanation:
First of all, we calculate the resistance of the lamp. The power of the lamp is given by
Where
P = 100 W is the power
V = 250 V is the voltage
R' is the resistance of the lamp
Solving for R',
Now this resistance is connected in parallel to the other resistance R, so their equivalent resistance is
(1)
Now the total power in the circuit is
P = 1100 W
And the voltage is
V = 250 V
So we can write
to find the equivalent resistance:
Therefore, rearranging (1), we find R: