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3 years ago

What is not a reason correlations are useful?

Physics

2 answers:

bearhunter [10]3 years ago

8 0

I believe it is Correlations allow you to determine causes.

Vikki [24]3 years ago

4 0

<span>Correlations allow you to make inferences.</span>

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A long wire carrying a 5.8 A current perpendicular to the xy-plane intersects the x-axis at x=−2.3cm. A second, parallel wire ca

adoni [48]

Answer:

a) v r = 0.7318 cm , b) r = 7.23 cm

Explanation:

The magnetic field generated by a wire carrying a current can be found with Ampere's law

∫ B. ds = μ₀ I

the length of a surface circulates around the wire is

s = 2π r

where r is the point of interest of the calculation of the magnetic field

B = μ₀ I / 2π r

In this exercise we have two wires, write the equation of the magnetic field of each one

wire 1 I = 5.8 A

B₁ = μ₀ 5,8 / 2π r₁

wire 2 I = 3.0 A

B₂ = μ₀ 3/2π r₂

the direction of the field is given by the rule of the right hand, the thumb indicates the direction of the current and the other fingers the direction of the magnetic field

Let's apply these expressions to our case

a) the two streams go in the same direction

using the right hand rule for each wire we see that between the two wires the magnetic fields have opposite directions so there is some point where the total value is zero

B₁ - B₂ = 0

B₁ = B₂

μ₀ 5,8 / 2π r₁ = μ₀ 3 / 2π r₂

5.8 / r₁ = 3 / r₂

5.8 r₂ = 3r₁

the value of r is measured from each wire, therefore

r₁ = 2.3 + r

r₂ = 2.3 -r

we substitute

5.8 (2.3 - r) = 3 (2.3 + r)

r (3 + 5.8) = 2.3 (5.8 - 3)

r = 2.3 2.8 / 8.8

r = 0.7318 cm

b) the two currents have directional opposite

with the right hand rule in the field you have opposite directions outside the wires

suppose it is zero on the right side where the wire with the lowest current is

B₁ = B₂

5.8 / r₁ = 3 / r₂

5.8 r₂ = 3 r₁

r₁ = 2.3 + r

r₂ = r - 2.3

5.8 (r - 2.3) = 3 (2.3 + r)

r (5.8 -3) = 2.3 (3 + 5.8)

r = 2.3 8.8 / 2.8

r = 7.23 cm

8 0

2 years ago

What happens inside when an air-filled, sealed can, is heated?.

g100num [7]

Answer:

It would explode

Explanation:

you're welcome

5 0

2 years ago

Read 2 more answers

Suppose you have a total charge qtot that you can split in any manner. Once split, the separation distance is fixed. How do you

dybincka [34]

Answer:

Answer is explained in the explanation section below.

Explanation:

Solution:

We know from the Coulomb's Law that, Coulomb's force is directly proportional to the product of two charges q1 and q2 and inversely proportional to the square of the radius between them.

So,

F = $\frac{Kq1q2}{r^{2} }$

Now, we are asked to get the greatest force. So, in order to do that, product of the charges must be greatest because the force and product of charges are directly proportional.

Let's suppose, q1 = q

So,

if q1 = q

then

q2 = Q-q

Product of Charges = q1 x q2

Now, it is:

Product of Charges = q x (Q-q)

So,

Product of Charges = qQ - $q^{2}$

And the expression qQ - $q^{2}$ is clearly a quadratic expression. And clearly its roots are 0 and Q.

So, the highest value of the quadratic equation will be surely at mid-point between the two roots 0 and Q.

So, the midpoint is:

q = $\frac{Q + 0}{2}$

q = Q/2 and it is the highest value of each charge in order to get the greatest force.

8 0

3 years ago

A spaceship enters the solar system moving toward the Sun at a constant speed relative to the Sun. By its own clock, the time el

klasskru [66]

B is the answer to this

3 0

3 years ago

An uncharged conductor has a hollow cavity inside of it. Within this cavity there is a charge of +10 µC that does not touch the

aliina [53]

Answer:

Explanation:

we have to make charge inside the conductor zero because we know that electric field inside the conductor should be zero

so, the outer surface of the conductor should contain + 10 uC of charge and the inner surface contains -10 uC

8 0

2 years ago