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Maslowich
3 years ago
13

As waves pass by a duck floating on a lake, the duck bobs up and down but remains in essentially one place. explain why the duck

is not carried along by the wave motion.
Physics
1 answer:
Rudiy273 years ago
3 0
The duck is not carried by the wave motion because <span>Waves move energy through a medium but don't transfer particles.  So when the waves pass by a duck floating on a lake, the duck just bobs up and down, but remains in its place.</span>
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A 2.0-mm-long, 1.0-mmmm-diameter wire has a variable resistivity given by rho(x)=(2.5×10−6)[1+(x1.0m)2]Ωmrho(x)=(2.5×10−6)[1+(x1
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Answer:

1.144 A

Explanation:

given that;

the length of the wire = 2.0 mm

the diameter of the wire = 1.0 mm

the variable resistivity R = \rho (x) =(2.5*10^{-6})[1+(\frac{x}{1.0 \ m})^2]

Voltage of the battery = 17.0 v

Now; the resistivity of the variable (dR) can be expressed as = \frac{\rho dx}{A}

dR = \frac{(2.5*10^{-6})[1+(\frac{x}{1.0})^2]}{\frac{\pi}{4}(10^{-3})^2}

Taking the integral of both sides;we have:

\int\limits^R_0  dR = \int\limits^2_0 3.185 \ [1+x^2] \ dx

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R = 3.185 [2 + \frac {2^3}{3}}]

R = 14.863 Ω

Since V = IR

I = \frac{V}{R}

I = \frac{17}{14.863}

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Answer:

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Substitute into equation 1

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The work done required to stretch the spring by additional 0.4 m is

W = 1/2(72)(0.4+0.5)²

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