Answer:
B. 7.07 m/s
Explanation:
The velocity of the stone when it leaves the circular path is its tangential velocity, , which is given by
where is the angular speed and is the radius of the circular path.
is given by
where is the frequency of revolution.
Thus
Using values from the question,
<em>Note the conversion of 75 cm to 0.75 m</em>
<span> it is electromagnetic waves that are made up of oscillating magnetic and electric fields </span>
Explanation:
first one will be second one
as the charge cancels out
second one will be forth one
as it has possitive charge
Answer:
In dB intensity will be equal to 159.74 dB
Explanation:
We have given intensity of sound produced by one singer is 76.7 dB
Sound intensity is calculated as
Now it is given that 41 singers are singing in chorus
So total intensity =
Now in dB intensity will be
Answer:
Force,
Explanation:
There are two positive charges, 2 C and 5 C, separated by a distance of 20 cm in a vacuum. What is the value of the modulus of the electrostatic force between them?
We have,
Charge on object 1, q₁ = 2 C
Charge on object 2, q₂ = 5 C
Distance between charges, r = 20 cm = 0.02 m
The electric force between two charges is given by the formula as follows :
Plugging all the values we get :
So, the electric force between two charges is .