The answer is 2.2 × 10^-14<span> kilometers
hope this helps</span>
<h2>
Answer:</h2>
0.31425 Tesla
<h2>
Explanation:</h2>
The magnetic field strength of a solenoid can be found by using the Ampere's law as follows;
BL = μ₀ x N x I -------------------(i)
Where;
B = magnetic field strength
L = length of the solenoid
μ₀ = magnetic constant = 1.257 x 10⁻⁶H/m
N = number of turns in the coil of the solenoid
I = current flowing through the coil of the solenoid.
<em>From the question, </em>
L = 20cm = 0.2m
N = 5000 turns
I = 10A
<em>Substitute these values into equation (i) as follows;</em>
B x 0.2 = 1.257 x 10⁻⁶ x 5000 x 10
0.2B = 6.285 x 10⁻²
<em>Solve for B;</em>
B = 6.285 x 10⁻² / 0.2
B = 31.425 x 10⁻²
B = 0.31425 T
Therefore, the magnetic field strength is 0.31425 Tesla
Explanation:
Below is an attachment containing the solution.
Answer:
70db
Explanation:
If one typewriter 's sound recorded 60 dB, therefore 10 typewriters that clack away would register 70 dB (doesn't seem 600 dB!), but it would only sound double as loud as compared with one typewriter. You would gathers typesetters to strike a noise level of 80 dB and jointly they will only sound four times as loud as compared single typewriter.
So, it would be
= 20 + 50
= 70db
