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3 years ago

14

An 80 kg skydiver is falling at terminal velocity. What is the value of air resistance acting on his body? Consider, what are th

e knowns and unknowns?

1 answer:

Mrac [35]3 years ago

5 0

Answer:

800 N

Explanation:

During terminal velocity, air resistance=weight

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3 years ago

A long, thin solenoid has 450 turns per meter and a radius of 1.06 . The current in the solenoid is increasing at a uniform rate

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Explanation:

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we know Induced EMF is given by

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Area of cross-section

$A=\pi R^2$ where

solving integration we get

$E.\cdot 2\pi r=\mu _0n\frac{\mathrm{d} i}{\mathrm{d} t}\pi R^2$

where r=distance from axis

R=radius of Solenoid

$\frac{\mathrm{d} i}{\mathrm{d} t}=\frac{Er}{\mu _0nR^2}$

$\frac{\mathrm{d} i}{\mathrm{d} t}=\frac{8.50\times 10^{-6}\times 3.49\times 10^{-2}}{4\pi \times 10^{-7}\times 450\times 1.06^2}$

$\frac{\mathrm{d} i}{\mathrm{d} t}=9.34 A/s$

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3 years ago