See the attached picture:
A 10,000-watt radio station transmits at 535 kHz.
2 answers:
Answer:
Energy is 10,000 Joules.
Explanation:
It is given that, a 10,000 watt radio station transmits at 535 kHz. We have to write the number of joules transmitted per second.
We know that number of joules transmitted per second is called the power. Its SI unit is watts. Mathematically, the power of radio station is given by :
Where
W is the work done by radio station
t is the time taken.
According to relation :
So,
Hence, energy per second is 10,000 Joules.
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We have that the electric field at the center of the metal ball due only to the charges on the surface of the metal ball is
From the question we are told that
A solid metal ball of radius 1.5 cm
bearing a charge of -15 nC is located near a hollow plastic ball of radius 1.9 cm bearing
uniformly distributed charge of -7 nC
The distance between the centers of the balls is 9 cm
Generally the equation for the electric field is mathematically given as
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Answer:
D
Explanation:
- The rate of the Diels-Alder is orders of magnitude faster if there is an electron-withdrawing group on the dienophile. For example, replacing a hydrogen on ethene with the electron-withdrawing group CN results in about a 10^5 increase in the reaction rate.
- Other common electron withdrawing functional groups that will accelerate the Diels Alder reaction of dienophiles include aldehydes, ketones, and esters.
- In short, any functional group conjugated with the pi bond which can act as a pi acceptor will accelerate a Diels-Alder reaction with a typical diene.
- See attachment for graphical explanation.
