1. An elevator is moving up at a constant velocity of 2.5 m/s, as illustrated in the

A simple dipole consists of two charges with the same magnitude, q, but opposite sign separated by a distance d. The EDM (electr

DedPeter [7]

Answer:

a. dW = ∫pEsinθdθ b. W = p.E

Explanation:

a. We know torque τ = p × E = pEsinθ where θ is the angle between p and E

Let the torque τ rotate the dipole by an amount dθ. So, the workdone dW = ∫τdθ = ∫pEsinθdθ

b. So, the total work done is gotten by integrating from 90 to θ. So,

W = ∫₉₀⁰dW

= ∫₉₀⁰pEsinθdθ

= pE∫₉₀⁰sinθdθ

= pE(cosθ - cos90)

=pEcosθ

= p.E

8 0

2 years ago

Suppose I have a spherical insulating shell with inner radius r and outer radius R. The shell has a uniformly distributed charge

a_sh-v [17]

Answer:

3Q / 4 pi (R^3 - r^3)

Explanation:

Charge density = charge / volume

volume of a spherical shell = $\frac{4}{3} \pi(R^{3} - r^{3})$

4 0

3 years ago

In this circuit, energy is transferred from a battery to a circuit wire and then to a light bulb, where some of it leaves the sy

svet-max [94.6K]

Answer: The correct order of energy transformation is from CHEMICAL ENERGY to ELECTRICAL ENERGY to LIGHT ENERGY

Explanation:

Energy which is simply defined as the ability to perform work is made up of different forms, these include:

- Mechanical energy: Associated with machines at work.

- LIGHT ENERGY: produced by light bulbs

- ELECTRICAL ENERGY: taking in by television set and other electrical appliances.

- CHEMICAL ENERGY: stores in food and other fuels

- Sound energy: Produced by vibrating objects example piano, drums.

According to the law of conservation of energy, energy can neither be created nor destroyed in a closed system, but can be transformed from one form to another, thereby keeping the energy in the closed system constant. From the question, the circuit is an example of a closed system and the order of energy transformation taking place is from the battery (CHEMICAL ENERGY) to ELECTRICAL ENERGY(power source) to LIGHT ENERGY(bulb). I hope this helps, thanks.

3 0

2 years ago

Mountain pull. A large mountain can slightly affect the direction of ""down"" as determined by a plumb line. Assume that we can

Nastasia [14]

Answer:

6.18 um

Explanation:

The plumb line will be pulled down by a combination of the gravitationall pull of Earth and of the mountain. The Earth pulls down and the mountain to the side. Because of this it will fall not in a straight line down, but slightly to the side. Since the plumb line will follow the compound gravity we can imagine a rectangle triangle formed by the plumb line, a vertical line that ends at the same height as the plumb line, and the sideways displacement.

The total gravity will be proportional to the plumb line lenght, the vertical line will be proportional to Earth's gravity and the sideways displacement to the mountain pull.

The gravity of Earth is 9.81 m/s^2

The pull of the mountain will be defined by Newton's law of universal gravitation:

$F = G \frac{m1 * m2}{r^2}$

Where

F: pull force

G: universal gravitational constant (6.67e-11 m^3/(kg * s)

m1: mass of the mountain

m2: mass of the plumb

r: distance between mountain and plumb (3 km in this case)

If we divide both sides by m2 we obtain the acceleration towards the mountain of the plumb

$a = G \frac{m1}{r^2}$

Now we need the mass of the mountain. This will be its volume times it's density. The volume depends on the radius (since we consider it as a sphere)

$m1 = \delta * \frac{4}{3} * \pi * r^3$

$m1 = 2.6e3 * \frac{4}{3} * \pi * 1000^3 = 1.09e13 kg$

So, the acceleration on the plumb will be

$a = 6.67e-11 \frac{1.09e13}{3000^2} = 8.08e-5 m/s^2$

This is very small compared to the pull of Earth, so we can make an approximation that the length of the plumb line is equal to vertical line.

We can use the principle of similar triangles to say that:

$\frac{\Delta x}{L} = \frac{a}{g}$

So:

$\Delta x = \frac{a * L}{g} = \frac{8.08e-5 * 0.75}{9.81} = 6.18e-6 m = 6.18 um$

3 0

3 years ago

Solid to liquid examples<br> Gas to liquid examples

KATRIN_1 [288]

ANSWER:

SOLID TO LIQUID EXAMPLES:

• Ice melting into water

• Solid butter melting into liquid

• Heating rocks up so much they become magma or lava

• Gallium melting in your hand

GAS TO LIQUID EXAMPLES:

• Dew

• Water droplets on the glass of cold drink

• Rain

• Fogging of glass of spectacles when enter from cold to warmer place

HOPE THIS HELPS, BRAINLIEST WILL BE APPRECIATED, THANK YOU! :)

5 0

1 year ago