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Alexxandr [17]
2 years ago
14

The force of kinetic friction between a box sliding on a surface depends on the ____ .

Physics
2 answers:
vazorg [7]2 years ago
6 0

Answer: speed of the box

Explanation: maybe

Vikentia [17]2 years ago
4 0

Force

\tt f_k=\mu_k.N

uk = sliding friction

N = normal force

answer option B

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calculate the diameter of a silver wire of length 75cm , which is extended by 1.85mm when a 10kg mass is suspended from it's end
sdas [7]

Answer:0.8\ mm

Explanation:

Given

length of wire l=75\ cm

change in length \Delta l=1.85\ mm

mass of wire m=10\ kg

Young's modulus for silver E=7.9\times 10^{10}\ N/m^2

load on wire F=mg

F=10\times 9.8=98\ kg

change in length is given by

\Delta l=\dfrac{Pl}{AE}

Where A=area of cross-section

A=\dfrac{Pl}{\Delta lE}

A=\dfrac{98\times 0.75}{1.85\times 10^{-3}\times 7.9\times 10^{10}}

A=\dfrac{73.5}{14.615\times 10^{7}}

A=5.029\times 10^{-7}\ m^2

also wire is the shape of cylinder so cross-section is given by

A=\dfrac{\pi d^2}{4}=5.029\times 10^{-7}\ m^2

\Rightarrow d^2=\dfrac{5.029\times 10^{-7}\times 4}{\pi }

\Rightarrow d^2=64.02\times 10^{-8}

\Rightarrow d=8\times 10^{-4}\ m

\Rightarrow d=0.8\ mm

4 0
3 years ago
What type of wave borders the violet end
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3 0
3 years ago
Read 2 more answers
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Answer:

Yes

Explanation:

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Explanation:

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U = 28,000 J

3 0
3 years ago
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