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Nata [24]
3 years ago
13

Bob is pushing a box across the floor at a constant speed of 1.5 m/s, applying a horizontal force whose magnitude is 60 n. alice

is pushing an identical box across the floor at a constant speed of 3 m/s, applying a horizontal force. (a) what is the magnitude of the force that alice is applying to the box?
Physics
1 answer:
earnstyle [38]3 years ago
7 0

120n

since the speed is doubled, her force is doubled

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Preston tossed a red ball upward and it reaches a maximum height of 3.0. What is the final velocity when it returns to prestons
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5 0
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Using Gauss's law, calculate the electric field at a point distance s from a long wire bearing uniform charge density. i need he
11111nata11111 [884]

Answer:

E = 2k  \frac{\lambda}{ r}

Explanation:

Gauss's law states that the electric flux equals the wax charge between the dielectric permeability.

We must define a Gaussian surface that takes advantage of the symmetry of the problem, let's use a cylinder with the faces perpendicular to the line of charge. Therefore the angle between the cylinder side area has the same direction of the electric field which is radial.

            Ф = ∫ E . dA = E ∫ dA = q_{int} /ε₀

tells us that the linear charge density is

            λ = q_ {int} /l

            q_ {int} = l λ

we substitute

            E A = l λ /ε₀

is area of ​​cylinder is

           A = 2π r l

we substitute

            E = \frac{ l \ \lambda}{ \epsilon_o \ 2\pi  \ r \ l }

             E = \frac{\lambda}{ 2\pi  \epsilon_o \ r}

the amount

            k = 1 / 4πε₀

            E = 2k  \frac{\lambda}{ r}

5 0
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You are the Engineering Duty Officer getting your submarine, the USS GREENVILLE, ready to put to sea. When nuclear material in t
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Answer:

Super-critical mass

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7 0
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a sponge and a bar of soap occupy the same amount of space, but the soap is much more dense than the sponge
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Yes, that's correct.  That's a big part of the reason why
the soap floats in water and the sponge sinks in it.

4 0
3 years ago
Read 2 more answers
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