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3 years ago

PLS HELP FOR PHYSICS

Physics

2 answers:

makvit [3.9K]3 years ago

8 0

Light is a particle and wave

Lorico [155]3 years ago

8 0

Answer:

The answer is the second option, Light is both a particle and a wave.

Explanation:

The first option is incorrect because Light and electrons aren't the same thing, One of the main reasons why is that particles of light which are called photons do not have any mass, while electrons have a negligible mass, but they still have some mass.

Both the third and fourth options are incorrect because Light is both a particle and a wave and they're not mutually exclusive as light behaves like a wave on some experiments and light behaves like a particle in some experiments.

Extra knowledge:

In my opinion, you could almost say that Light is kind of like Schrodinger's cat, if you place a cat inside the radioactive chamber until you open the chamber you would not know that whether the cat is dead or alive, so technically the cat is both dead and alive.

In the same way Light behaves as a wave and a particle and you won't be able to find out which unless you conduct an experiment.

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(Please explain why) A bar magnet is dipolar. This means is has ____ poles.

earnstyle [38]

Di = two, just like 'bi'. --take di-zygotic twins, or di-atomic + di-sulphide, etc.

5 0

3 years ago

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5. How will you separate water from petrol?

ohaa [14]

Answer:

by a seprating funnel or let it stand it will settle on its own

Explanation:

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3 years ago

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What speed would a proton need to achieve in order to circle Earth 1790 km above the magnetic equator, where the Earth's mag- ne

irinina [24]

Answer:

The velocity is 31.25 m/s and direction is toward west.

Explanation:

Given that,

Distance $h= 1790 km = 1.790\times10^{6}\ m$

Magnetic field $B=4\times10^{-8}\ T$

Mass of proton $m=1.673\times10^{-21}\ Kg$

Radius of earth $R =6.38\times10^{6}\ m$

Radius of orbit $r=R+h$

$r=6.38\times10^{6}+1.790\times10^{6}$

$r=8170000\ m$

We need to calculate the speed

Using formula of magnetic field

$Bvq=\dfrac{mv^2}{r}$

$v=\dfrac{Bqr}{m}$

Put the value into the formula

$v=\dfrac{4\times10^{-8}\times1.6\times10^{-19}\times8170000}{1.673\times10^{-21}}$

$v=31.25\ m/s$

Hence, The velocity is 31.25 m/s and direction is toward west.

6 0

3 years ago

Help please

Anarel [89]

Answer:

1) D, 2) D, 3) B, 4) B, 5) C

Explanation:

You are asked to select the correct answer

1) The conservation of energy is one of the most important principles of physics that allows solving countless problems in life.

the correct answer is D

2) when a body falls, the gravitational potential energy is transformed into kinetic energy and both are transformed into thermal energy

the correct answer is D

3) When the gravitational potential energy is maximum, the kinetic energy is minimum and when the kinetic energy is maximum, the gravitational energy is minimum.

Correct answer B

4) speed is defined by

v = x / t

so the correct answer is B in the SI system

5) when we repeat a measurement several times, the random or statistical errors decrease, therefore the confidence of the measurement increases.

The correct answer is C

4 0

2 years ago

If you lift a five pound object 18 inches how many joules of energy did yo use?

kogti [31]

The work is 90 as 5 times 18

4 0

3 years ago