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2 years ago

Which statements about electric field lines are correct? Check all that apply.

Physics

1 answer:

Natali [406]2 years ago

4 0

Answer:What is the chocies

Explanation:

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How might the climate be affected if you were people drove automobiles and more people road bikes or use public transportation l

Hoochie [10]

The level of greenhouse gases in our atmosphere would decrease, due to less automobiles.

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2 years ago

A charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a th

Mila [183]

Answer:

$x = a + \frac{a\sqrt2}{\sqrt3 - \sqrt2}$

Explanation:

Position of charge 3q is x = 0

position of charge -2q is x = a

so here we know that

when two charges are of opposite nature then the electric field will be zero on the line joining the two charges at the position near to smaller magnitude charge

So here the electric field will be zero if the field due to 3q is counterbalanced by field due to -2q

so here we can say

$\frac{k(3q)}{(r+a)^2} + \frac{k(-2q)}{r^2} = 0$

$\frac{3}{(r + a)^2} = \frac{2}{r^2}$

$\frac{r+a}{r} = \sqrt{\frac{3}{2}}$

$1 + \frac{a}{r} =\sqrt{\frac{3}{2}}$

$\frac{a}{r} = \frac{\sqrt3 - \sqrt2}{\sqrt2}$

so we will have

$r = \frac{a\sqrt2}{\sqrt3 - \sqrt2}$

so the x coordinate of this position is given as

$x = a + \frac{a\sqrt2}{\sqrt3 - \sqrt2}$

6 0

3 years ago

1. A large turbine has an initial angular momentum of 6700 kgm^2/s. A storm is rolling in and the wind picks up. 8 seconds later

LekaFEV [45]

Answer:

262.5 Nm

Explanation:

Torque is the rate of change of angular momentum.

Hence, we have

$\tau = \dfrac{\Delta L}{t}$

Δ<em>L</em> is the change in angular momentum.

Using values in the question,

$\tau = \dfrac{8800-6700 \text{ kg m}^2\text{/s}}{8\text{ s}} = 262.5 \text{ Nm}$

4 0

3 years ago

Calculate the heat required, in calories, to raise

Goshia [24]

Answer: $Q=4450.74\ J$

Explanation:

Given

mass of tin $m=100 gm$

Also we know that

specific heat of tin $c_{tin}=0.21 J/gm-^{\circ}C$

Melting Point of Tin $T=231.94^{\circ}C$

Heat required to raise the temperature of 100 gm tin is given by

$Q=mc\Delta T$

where $Q=heat\ added$

$c=specific\ heat\ of\ tin$

$\Delta T=change\ in\ temperature$

$Q=100\times 0.21\times (231.94-20)$

$Q=4450.74\ J$

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3 years ago

What is the relationship between electric currents and magnetic fields?

Aleksandr [31]

The electric currents induces a magnetic field. They changing magnetic field can be induce an electric current.

7 0

3 years ago