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4 years ago

Why does a tail appear when a comet nears the sun?

1 answer:

3 0

It heats up. the ice transforms directly from a solid to a vapor, releasing dust particles. the solar wind sweeps the material and it forms what to appears to be a tail.

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Two parallel wires carry equal currents in the opposite directions. Point A is midway between the wires, and B is an equal dista

zepelin [54]

Answer:

Complete Question:(missing part)

The current in the left wire having magnitude is = 210 A

The Current in the right wire having magnitude is = 10 A

Answer:

a. $B net = \frac{\mu_{0} }{2\pi(\frac{d}{2}) } (I_{1} +I_{2} )$

Ratio = B 1/B 2 = 210/10 = 21

$b.B net = \frac{\mu_{0} }{2\pi(\frac{d}{2}) } (\frac{I_{1}}{3}-I_{1}} )$

Ratio = B 1/B 2 = 210/3 X10 = 7

Explanation:

Ratio of the magnitude of the magnetic field at point A to that at point B =?

The current in the left wire having magnitude is = 210 A

The Current in the right wire having magnitude is = 10 A

distance between two wires = d

Given that both wires are carrying equal current but in opposite direction therefore

Magnetic field linked with the left wire at point A distance =d/2= according to biot savarts law

$B = \frac{\mu_{0} \times I_{1} }{2\pi\times\frac{d}{2} }$

Magnetic field linked with the right wire at point B distance =d/2

$B = \frac{\mu_{0} \times I_{2} }{2\pi\times\frac{d}{2} }$

Net magnetic field added

B net = B 1 + B 2

$B net = \frac{\mu_{0} }{2\pi(\frac{d}{2}) } (I_{1} +I_{2} )$

Ratio = B 1/B 2 = 210/10 = 21

Magnetic field linked to left wire at point B(d+ d/2)

$B = \frac{\mu_{0} \times I_{1} }{2\pi\times\frac{3d}{2} }$

Magnetic field linked to right wire at point B(d+ d/2)

$B = \frac{\mu_{0} \times I_{2} }{2\pi\times\frac{3d}{2} }$

Net magnetic field subtracted

B net = B 1 - B 2

$B net = \frac{\mu_{0} }{2\pi(\frac{d}{2}) } (\frac{I_{1} }{3}-1 } )$

Ratio = B 1/B 2 = 210/3 X10 = 7

4 0

3 years ago

A sample of a material has 200 radioactive particles in it today. Your great-grandmother measured 400 radioactive particles in i

uysha [10]

It will have 100 radioactive particles.

6 0

4 years ago

Read 2 more answers

HELP PLSSS<br> how many licks does it take to get to the center of a tootsy pop?

Nat2105 [25]

Answer:

364 licks

Explanation:

3 0

3 years ago

Read 2 more answers

A cave diver enters a long underwater tunnel. When her displacement with respect to the entry point is 20 m, she accidentally dr

Sladkaya [172]

Answer:

displacement vector is -16i

Explanation:

Given data:

Displacement relative to entry of tunnel is 20 m

Distance from entry of tunnel at which she notice about camera missing is 6 m

swim distance is 10 m

total distance from entry of tunnel after she swin back is 20+ 6 = 26 m

After covering 10 m to find a camera she will be at 26 -10 = 16 m

If direction out from tunnel is taken as positive then her displacement vector with respect to entry of tunnel is - 16i

where i is unit positive vector.

7 0

3 years ago

In an experiment, a researcher can make claims about causation

Yakvenalex [24]

<span>In an experiment, a researcher can make claims about causation if the independent variable changes because of changes made to the dependent variable. Causation works on cause and effect, so the changed independent variable is the cause and the changed dependent variable is the effect. In an experiment the independent variable is changed to determine the dependent variables value, so the two are directly related.</span>

8 0

4 years ago