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liubo4ka [24]
3 years ago
9

Suppose you walk 12.5 m in a direction exactly 19° south of west then you walk 19.5 m in a direction exactly 39° west of north.

How far are you from your starting point in m?
Physics
1 answer:
GaryK [48]3 years ago
7 0

Answer:

D = 26.97 m

Explanation:

given,

you walk 12.5 m in a direction exactly 19° south of west

after that 19.5 m in a direction exactly 39° west of north.

distance calculation from the starting point = ?

D₁ = d₁ cos θ

D₁ = 12.5 x cos 19°

D₁ = 11.82 m

D₂ = d₂ cos θ

D₂ = 19.5 x cos 39°

D₂ = 15.15 m

distance from the starting point

D = D₁ + D₂

D = 11.82 + 15.15

D = 26.97 m

Distance from the starting point is equal to  26.97 m

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A length of copper wire carries a current of 14 A, uniformly distributed through its cross section. The wire diameter is 2.5 mm,
gavmur [86]

Answer:

a. ρ_\beta=1.996J/m^3

b. U_E=9.445x10^{-15} J/m^3

Explanation:

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ρ_\beta=\frac{\beta^2}{2*u_o}

ρ_\beta=\frac{1}{2*u_o}*(\frac{u_o*i^2}{2\pi *r})^2

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b. The electric field can be find using the equation:

U_E=\frac{1}{2}*E_o*E^2

E=(\frac{i*R}{l})^2

U_E=\frac{1}{2}*8.85x10^{-12}*(\frac{14A*3.3}{1000m})^2

U_E=9.445x10^{-15} J/m^3

4 0
3 years ago
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velikii [3]

Answer: 20 newtons

Explanation:

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Force applied by Samantha = 10 newtons

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Since net force of forces applied in the same direction is obtained by adding up the seperate forces applied, then

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Thus, the net force of their efforts is 20 newtons.

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saveliy_v [14]
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Two possible answers are air resistance and friction.

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7 0
3 years ago
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pickupchik [31]
By definition we have that
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galina1969 [7]

Answer:

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