Answer:
A) The resonance angular frequency in an L-R-C circuit is

B) The current can be found by calculating the impedance of the system.

Since
at resonance.
So, 
To solve this problem it is necessary to apply the concepts related to Wavelength depending on the frequency and speed of light.
The equation that meets these parameters is given by

Where,
c = Speed of light

f = Frequency
Our values are given as
velocity of light in free space
f = 2Hz
Replacing we have that

Therefore the correct answer is B.
Answer: The answers are A. Wind, B. Water, and D. Gravity.
Explanation: All four factors contribute to weathering and erosion; however, ice is not shown in the image, so it likely did not play a role in the collapse of the cliff.
(Next time please provide an image so it would be easier!)
<span>F=ma = 3000x2m/sec^2 =6000 newtons. </span>
The statements that correctly compare the gravitational force with the electrical force are the following:
-The gravitational force can be attractive.
-The electrical force can be repulsive.
-The electrical force can be attractive.
-Any two objects experience a gravitational force between them.