Im saying a or b but i pick B
Answer:
Explanation:
We are given that
Speed of light,v=
Diameter of ring,d=92 m
Radius,r=
Current, I=0.40 A
We have to find the number of electrons in the beam.
We know that
Current,I=
Where q= ne
Using the formula
Answer:
Percentage change in tension is 3.8%
Explanation:
We have given initially frequency = 440 Hz
Let tension in the string at this frequency is
Now second frequency is
Frequency in string is given by
From the relation we can say that
Percentage change in tension is equal to
%
So percentage change in tension is 3.8%
F = G m1*m2 / r^2 => [G] = [F]*[r]^2 /([m1]*[m2]) = N * m^2 / kg^2
That is one answer.
Also, you can use the fact that N = kg*m/s^2
[G] = kg * m / s^2 * m^2 / kg^2 = m^3 /(s^2 * kg)
I think it would be B. 90 dB