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arlik [135]
3 years ago
6

The magnetic field a distance 2 cm from a long straight current-carrying wire is 2 × 10–5 t. the current in the wire is:

Physics
1 answer:
Sliva [168]3 years ago
6 0

Current in the wire = 2 A

Explanation:

the magnetic field is given by

B= \frac{\mu i}{2\pi r}

μo= 4π x 10⁻⁷ Tm/A

i= current

r=0.02 m

B = magnetic field= 2 x 10⁻⁵ T

2 x 10⁻⁵= (4π x 10⁻⁷)(i) / (2π*0.02)

i=2 A

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a 20 kg projectile is launched from a cannon. a. if the projectile leaves the cannon with a velocity of 54 m/s, what is the work
Artyom0805 [142]

Answer:

KE = 1/2 M v^2       kinetic energy of projectile

KE = 1/2 * 20 * (54 m/s)^2 = work done on projectile

W = 10 * 54^2 = work done on projectile

W = 29,160 J

7 0
2 years ago
Consider a monochromatic electromagnetic plane wave propagating in the x direction. At a particular point in space, the magnitud
weqwewe [10]

Answer:

a)   S = 2.35 10³   J/m²2 ,  

b)and the tape recorder must be in the positive Z-axis direction.

the answer is 5

c) the direction of the positive x axis

Explanation:

a) The Poynting vector or intensity of an electromagnetic wave is

          S = 1 /μ₀ E x B

if we use that the fields are in phase

          B = E / c

we substitute

         S = E² /μ₀ c

let's calculate

        s = 941 2 / (4π 10⁻⁷  3 10⁸)

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b) the two fields are perpendicular to each other and in the direction of propagation of the radiation

In this case, the electro field is in the y direction and the wave propagates in the ax direction, so the magnetic cap must be in the y-axis direction, and the tape recorder must be in the positive Z-axis direction.

the answer is 5

C) The poynting electrode has the direction of the electric field, by which or which should be in the direction of the positive x axis

4 0
3 years ago
Why are some substances gases at room temperature but others are liquid or solid?
Otrada [13]

Answer:

The presence of strong intermolecular forces favors a condensed state of matter. liquid or solid), while very weak intermolecular interaction favor the gaseous state.

4 0
2 years ago
If the amount of work done was 6 joules on an object and the object was moved 30m,
Nonamiya [84]

Answer:

180

Explanation:

Work done= Force x distance

<u>So rearrange the formula to find the force</u>

Force= Work done/distance

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5 0
3 years ago
How far will you travel if you walk for 10.0 minutes at a speed of 1.50 m/s?
fredd [130]

Answer:

15

Explanation:

distance = speed × time.

7 0
4 years ago
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