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3 years ago

According to Kepler, which planet travels the fastest?

Physics

2 answers:

Gwar [14]3 years ago

4 0

The answer is "Mercury".

Stolb23 [73]3 years ago

3 0

Answer: Mercury

<u>Explanation:</u>

According to <u>second Kepler's law of planetary motion</u>:

The line joining the planet and the sun sweeps equal areas in equal amount of time. This describes the speed of the planet.

In order to conserve momentum, the planet closest to Sun would travel fastest and planet farthest from Sun would travel slowest.

Since Mercury is the closest planet to sun, it would be fastest.

You might be interested in

In a double slit experiment, the intensity of light at the center of the central bright fringe is measured to be 6.2 µW/m2. What

-BARSIC- [3]

Answer:

I_FWHW = 3.2 μW / m²

Explanation:

In the analysis of optics and electricity a very useful magnitude is the width at half height (FWHW) and the intensity at this height, which is given by

I_FWHW = I₀ / 2

corresponds to the width of the line for this intensity.

In this case they give the maximum intensity for which

I_FWHW = 6.2 / 2

I_FWHW = 3.2 μW / m²

You do not give more data in your exercise, but the most interesting calculation is to find the angle values for which you have this intensity since it is this range is 50% of the energy of the system, have I write the equation for this calculation

I = Io cos² x₁ (sin x / x)²

x₁ = π d sin θ /λ

x = π b sin θ /λ

where d is the separation of the slits and b the width of each slit

5 0

4 years ago

According to the __________perspective, people who suffer from PTSD are classically conditioned.

patriot [66]

According to the pavlovian perspective, people who suffer from PTSD are classically conditioned.

This is referred to as post traumatic stress disorder which is a mental disorder from a terrifying incident.

The pavlovian perspective however view this disorder as being a type of classical conditioned one.

Read more about Post traumatic stress disorder here brainly.com/question/943079

#SPJ1

5 0

2 years ago

An 80kg sled rider starts sledding down a 100m hill from rest. If her final velocity is 15m/s, what is he acceleration down the

krok68 [10]

Given :

An 80kg sled rider starts sledding down a 100m hill from rest. If her final velocity is 15m/s.

To Find :

The acceleration down the hill.

The force needed for that kind of acceleration.

Solution :

By equation of motion :

$v^2 -u^2 = 2as\\\\a = \dfrac{v^2-u^2}{2s}\\\\a = \dfrac{15^2 -0^2}{2\times 100}\\\\a = 1.125\ m/s^2$

Force required is, F = ma

F = 80×1.125 N

F = 90 N

Hence, this is the required solution.

6 0

3 years ago

Neutrons incident on a heavy nucleus with spin J 0 show a resonance at an incident energy ER = 250 eV in the total cross-section

ivolga24 [154]

Answer:

elastic partial width is 2.49 eV

Explanation:

given data

ER E = 250 eV

spin J = 0

cross-section magnitude σ = 1300 barns

peak P = 20ev

to find out

elastic partial width W

solution

we know here that

σ = λ²× W / ( E × π × P ) ...................1

put here all value

σ = (0.286)² × W × $10^{-16}$ / ( 250 × π × 20 )

1300 × $10^{-24}$ = (0.286)² × W × $10^{-16}$ / ( 250 × π × 20 )

solve it and we get W

W = 249.56 × $10^{-2}$

so elastic partial width is 2.49 eV

8 0

4 years ago

Q15.17 Both wave intensity and gravitation obey inverse-square laws. Do they do so for the same reason?Discuss the reason for ea

s2008m [1.1K]

(a) Intensity obeys inverse square law from basis of light passing through a given surface.

(b) Gravitation obeys inverse square law from the basis of force between two masses.

<h3>What is intensity?</h3>

Intensity is the ratio is ratio of power to area of a given surface.

I = P/A (W/m²)

where;

P is power
A is area

<h3>Universal gravitation law</h3>

$F = \frac{Gm_1m_2}{r^2}$

Intensity and gravitation do not obey inverse square law for same reason;

Intensity obeys inverse square law from basis of light passing through a given surface.
Gravitation obeys inverse square law from the basis of force between two masses.

<h3>Acceleration of the block</h3>

a = v²/A

a = (3.9²)/0.12

a = 126.75 m/s²

Learn more about acceleration here: brainly.com/question/605631

#SPJ1

7 0

2 years ago