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yawa3891 [41]
3 years ago
10

A wire has a current that flows to the right.

Physics
2 answers:
san4es73 [151]3 years ago
6 0

Answer:

(D) circles around the wire that go in at the bottom

Explanation:

The direction of magnetic field can be determined by using right hand rule. This rule states that if the thumb shows the electric current, then the curled finger will give the direction of magnetic field.

In this case, a wire has a current that flows to the right. According to right hand rule, the direction of magnetic field will be given by curled finger i.e. circles around the wire that go in at the bottom.

Hence, the correct option is (D) circles around the wire that go in at the bottom.                                                  

Natalija [7]3 years ago
4 0

D) circles around the wire that go in at the bottom

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"The burning of fossil fuels and ___________ from nuclear power provide about 87% of the energy used in the world."
r-ruslan [8.4K]

Explanation:

"The burning of fossil fuels , oil and natural and power from nuclear power provide about 87% of the energy used in the world.

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6 0
3 years ago
In a crash test, a truck with mass 2100 kg traveling at 22 m/s smashes head-on into a concrete wall without rebounding. The fron
slega [8]

Answer:

a)   v_average = 11 m / s, b)  t = 0.0627 s

, c)    F = 7.37 10⁵ N

, d)   F / W = 35.8

Explanation:

a) truck speed can be found with kinematics

         v² = v₀² - 2 a x

The fine speed zeroes them

           a = v₀² / 2x

           a = 22²/2 0.69

           a = 350.72 m / s²

The average speed is

           v_average = (v + v₀) / 2

           v_average = (22 + 0) / 2

           v_average = 11 m / s

b) The average time

          v = v₀ - a t

          t = v₀ / a

          t = 22 / 350.72

          t = 0.0627 s

c) The force can be found with Newton's second law

             F = m a

             F = 2100 350.72

             F = 7.37 10⁵ N

.d) the ratio of this force to weight

             F / W = 7.37 10⁵ / (2100 9.8)

             F / W = 35.8

.e) Several approaches will be made:

- the resistance of air and tires is neglected

- It is despised that the force is not constant in time

- Depreciation of materials deformation during the crash

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Answer:

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