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4 years ago

Explain the difference between displacement and distance

1 answer:

6 0

<span>Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.</span>

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What will happen if there is a change in a magnetic field?

soldi70 [24.7K]

If the magnetic field will change the electric current will also change.
Because the magnetic field relies on magnetic materials. Any deceleration of these two materials it will cause a huge effect. The earth magnetic field is protecting the atmosphere from the solar wind any sudden changes will cause navigational disaster.

8 0

3 years ago

Read 2 more answers

You have a lens whose focal length is 6.91 cm. You place an object on the axis of the lens at a distance of 11.1 cm from it. How

stellarik [79]

Answer:

4.2591 cm

Explanation:

We have given focal length of the lens f=6.91 cm

Object distance u =11.1 cm

We have to find the image distance that is v

For the lens we know that $\frac{1}{f}=\frac{1}{v}-\frac{1}{u}$

So $\frac{1}{6.91}=\frac{1}{v}-\frac{1}{11.1}$

$0.1447=\frac{1}{v}-0.09$

$\frac{1}{v}=0.2347$

$v=4.2591cm$

7 0

4 years ago

Define thermodynamics ???

BartSMP [9]

Answer:

The term thermodynamics comes from the Greek words therme (heat) and dynamis (force)

Explanation:

Thermodynamics can be defined as the science of energy. Thought everything the world has an idea of what energy is, it's hard to define it precisely.

Energy can be considered as the ability to cause change.

The term thermodynamics comes from the Greek words therme (heat) and dynamis (force), which corresponds to the most descriptive of the first efforts to convert heat into energy. At present, the concept is interpret broadly to include Energy Aspects and their transformations, including power generation, cooling and relationships among the properties of matter.

3 0

4 years ago

A ray of light is moving from a material having a high index of refraction into a material with a lower index of refraction.(a)

Sveta_85 [38]

(a) Away from the normal

The direction of bending of the ray of light can be found by using Snell's law:

$n_1 sin \theta_1 = n_2 sin \theta_2$

where

n1, n2 are the index of refraction of the first and second medium, respectively

$\theta_1, \theta_2$ are the angle of the incident and refracted ray with respect to the normal to the surface, respectively

In this problem, the ray of light moves from a material with high index of refraction to a material with lower index, so:

$n_1 > n_2$

Re-arranging Snell's law we find

$sin \theta_2 = \frac{n_1}{n_2} sin \theta$

since

$\frac{n_1}{n_2}>1$

we also have

$sin \theta_2 > sin \theta_1\\\theta_2 > \theta_1$

so the ray of light bends away from the normal.

(b) The wavelength is greater in the second material (the one with lower index of refraction)

The wavelength of the light in a medium is given by

$\lambda=\frac{\lambda_0}{n}$

where

$\lambda_0$ is the wavelength of the light in a vacuum

n is the refractive index

We can rewrite the equation as

$\lambda_0 = \lambda_1 n_1 = \lambda_2 n_2$

And isolating $\lambda_2$ from the second equation

$\lambda_2 = \frac{n_1}{n_2} \lambda_1$

where

$\lambda_1 = 600 nm\\\frac{n_1}{n_2}>1$

So, we have that the wavelength in the second medium (the one with lower index of refraction) is longer than the wavelength in the first medium.

(c) The frequency is the same

While wavelength and speed of a light wave depend on the medium in which the wave is travelling through, the frequency does not depend on that, so it is exactly the same in the two mediums.

5 0

4 years ago

Boyle's law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4l , the press

Anna11 [10]

Boyle's law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4l , the pressure is 720 kpa (kilopascals). What is the pressure when the volume is 10l ?

7 0

3 years ago