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3 years ago

What is the magnitude of the electric force between two point charges with Q1 = -1.5 C and Q2 = 0.8 C at a distance of 1 km?

Physics

1 answer:

Ilia_Sergeevich [38]3 years ago

8 0

Answer:

F = -10800 N

Explanation:

Given that,

Charge 1, $q_1=-1.5\ C$

Charge 2, $q_2=0.8\ C$

Distance between the charges, $d=1\ km=10^3\ m$

We need to find the electric force acting between two point charges. Mathematically, it is given by :

$F=k\dfrac{q_1q_2}{d^2}$

$F=-9\times 10^9\times \dfrac{1.5\times 0.8}{(10^3)^2}$

F = -10800 N

So, the magnitude of electric force between two point charges is 10800 N. Hence, this is the required solution.

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lubasha [3.4K]

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andrew11 [14]

Answer:

2,25 g/cm3

Explanation:

Hi, you have to know one thing for this.. Density = mass/Volume,

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Later, have on account the mass never changes, so you crush the bread and the mass is the same.. so when you have the mashed bread.. you know that the mass is 2790 g and the volume of the bag is 1240 cm3, so you apply the main equation.... density=2790 g / 1240 cm3 , so density = 2,25 g/cm3

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3 years ago

Volcanic Island Arcs, such as Japan, form when a(n) __________ plate is subducted below a(n) _________________ and takes seawate

MrMuchimi

Volcanic Island arcs form when an oceanic tectonic plate is subducted below a tectonic plate  taking seawater with it.

Volcanic island arcs occur offshore during volcanoes. They occur due to the subduction of an oceanic plate under another tectonic plate. Volcanic Island arcs occur mostly in ocean basins.

Due to the subduction of oceanic plates under tectonic plates, Island Arcs are found, mostly along the margins of continent.

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Learn more : brainly.com/question/18662349

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3 years ago

Which of the following statements are true concerning the creation of magnetic fields?

Soloha48 [4]

Answer:

A moving electric charge creates a magnetic field at all points in the surrounding region.

An electric current in a conductor creates a magnetic field at all points in the surrounding region.

A permanent magnet creates a magnetic field at all points in the surrounding region.

Explanation:

Magnetic field can be produced by:

- moving charges (i.e. a moving electron, or a current in a conductor)

- A magnet

The strength of the magnetic field produced by a current-carrying wire is

$B=\frac{\mu_0 I}{2\pi r}$

where

I is the current

r is the distance from the wire

As we see from the formula, the magnetic field is produced at all points in the surrounding region, because B becomes zero only when r becomes infinite. The same is true for the magnetic field created by a single moving charge or by a magnet.

The following choices instead are not correct:

- A single stationary electric charge creates a magnetic field at all points in the surrounding region.

- A distribution of electric charges at rest creates a magnetic field at all points in the surrounding region.

Because they involve the presence of stationary charges, and stationary charges do not produce magnetic fields.

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