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Maksim231197 [3]

3 years ago

11

Which happens to the magnetic field of a wire when you change the direction of the current in the wire? It becomes stronger. It

becomes weaker. It changes direction too. It stays the same.

1 answer:

scZoUnD [109]3 years ago

7 0

Answer C. The magnetic field changes direction too.

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Savatey [412]

Answer:

C = 1.01

Explanation:

Given that,

Mass, m = 75 kg

The terminal velocity of the mass, $v_t=60\ m/s$

Area of cross section, $A=0.33\ m^2$

We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,

Weight of the object = drag force

R = W

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C is drag coefficient

So,

$C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01$

So, the drag coefficient is 1.01.

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