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:
There is only a beat frequency when the frequency heard (perhaps a tuning fork) is different from the frequency from the object in question (piano string, etc.).
The beat frequency equals the difference of the frequencies of the sources.
Answer:
soil additive
Explanation:
Soil Additive
The three main components of humus are fulvic acid, humic acid and humin. The spongy nature of humus helps it to trap and hold water, this particular property also helps to aerate the soil as humus expands and contracts with available water.
The two trains will collide pushing each other back slightly. The momentum will transfer from one train to another pushing each other back