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3 years ago

Two identical metallic sphere having unequal opposite charges are are placed

Physics

1 answer:

velikii [3]3 years ago

4 0

Answer:

Let the initial charges be q1 and q2 respectively.

After they come in contact, the charges are rearranged such that they acquire same charge.

let us say that charge on each of them is Q.

They are again brought apart at a distance of 0.9 m. Hence, the force between them will be given as

F = kQ2 / r2

0.025 = (9×109 x Q2) / 0.92

Q2 = 0.025 x 0.92 / 9×109

Q = 1.5 x 10-6 C

Explanation:

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What is the formula for electrostatic force?

Nonamiya [84]

F = k $\frac{q1 q2 }{ r^{2} }$

k - coefficient
q1 and q2 - charge
r - distance btw them

7 0

4 years ago

Read 2 more answers

Open the Faraday Law simulation and discover what you can about induction. Make a list of ways to cause induction.

nika2105 [10]

Answer:

Current can be induced in a lot of ways. I'll try and list as much of these methods as I can here.

1. Moving a bar magnet relative to a wire coil

2. Moving a wire coil relative to a magnet.

3. Move a wire coil that has electricity flowing though it relative to a wire coil without electricity flowing through it.

4. Moving a current carrying circuit relative to a non-current carrying circuit

5. Rapidly opening and closing the switch of a current carrying circuit beside a non current carrying circuit.

6. Moving a bar magnet through the middle of a wire coil.

7. Moving a wire coil through a magnet

8. Moving a circuit relative to a magnetic field.

The main idea is to cause a change in the magnetic field, or to change the available area of the wire loop, or to change the angle between the field and the loop.

5 0

4 years ago

the ball is accelerating at a rate of 10 m/s squared. the balls mass if 5 kg. what is the net force on the ball? help me men ple

nevsk [136]

Answer:

50N

Explanation:

$F=ma\\F=(5kg)*(10m/s^{2})\\F=50N$

6 0

2 years ago

Equipotential lines are usually shown in a manner similar to topographical contour lines, in which the difference in the value o

Anna35 [415]

Answer:

the correct one is 2. the equipotential lines must be closer together where the field has more intensity

Explanation:

The equipotential line concept is a line or surface where a test charge can move without doing work, therefore the potential in this line is constant and they are perpendicular to the electric field lines.

In this exercise we have a charge and a series of equipotential lines, if this is a point charge the lines are circles around the charge, where the potential is given by

V = k q / r

also the electric field and the electuary potential are related

E = $- \frac{dV}{dr}$

therefore the equipotential lines must be closer together where the field has more intensity

When checking the answers, the correct one is 2

3 0

3 years ago

A rectangular wooden block measures 10.0 cm × 4.00 cm × 2.00 cm. When the block is placed in water, it floats horizontally, with

Alex Ar [27]

Answer:

825 kgm⁻³

Explanation:

ρ = density of wood = ?

ρ' = density of water = 1000 kgm⁻³

V = volume of wood = 10 x 4 x 2 = 80 cm³ = 80 x 10⁻⁶ m³

V' = Volume of water displaced = 10 x 4 x 1.65 = 66 cm³ = 66 x 10⁻⁶ m³

Using equilibrium of force in vertical direction

Force of buoyancy = Weight of the wood

ρ' V' g = ρ V g

ρ' V' = ρ V

(1000) (66 x 10⁻⁶) = ρ (80 x 10⁻⁶)

ρ = 825 kgm⁻³

5 0

3 years ago