Which is a solar eclipse?

Answers

Answer 1

Answer:

The core, or middle, of the Sun is the hottest part. Hot gasses bubble up from the core to the surface of the Sun. When the gasses burn, heat and light are produced.

Answer 2

Answer: The next one will be an annular solar eclipse (also known as a "ring of fire" solar eclipse) on Sept. 1, 2016.

A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth’s surface. But whether the alignment produces a total solar eclipse, a partial solar eclipse or an annular solar eclipse depends on several factors, all explained below.
The fact that an eclipse can occur at all is a fluke of celestial mechanics and time. Since the moon formed about 4.5 billion years ago, it has been gradually moving away from Earth (by about 1.6 inches, or 4 centimeters per year). Right now the moon is at the perfect distance to appear in our sky exactly the same size as the sun, and therefore block it out. But this is not always true..

When is the next solar eclipse?

The next solar eclipse will be an annular eclipse on Sept. 1, 2016.

According to Geoff Gaherty of Starry Night Education, it will be visible over most of Africa, the southern Arabian Peninsula, and much of the Indian Ocean. Maximum eclipse occurs in Antarctica at 09:07 UT.

The next solar eclipse visible from North America will be a total eclipse on Aug. 21, 2017. It will sweep across the continental United States from Oregon to Georgia.

How Solar Eclipses Work: When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle. See how solar eclipses occur in this Space.com infographic.
How Solar Eclipses Work: When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle.
Types of solar eclipses

There are four types of solar eclipses: total, annular, partial and hybrid. Here’s what causes each type:

Total solar eclipses

These are a happy accident of nature. The sun's 864,000-mile diameter is fully 400 times greater than that of our puny moon, which measures just about 2,160 miles. But the moon also happens to be about 400 times closer to Earth than the sun (the ratio varies as both orbits are elliptical), and as a result, when the orbital planes intersect and the distances align favorably, the new moon can appear to completely blot out the disk of the sun. On the average a total eclipse occurs somewhere on Earth about every 18 months.

There are actually two types of shadows: the umbra is that part of the shadow where all sunlight is blocked out. The umbra takes the shape of a dark, slender cone. It is surrounded by the penumbra, a lighter, funnel-shaped shadow from which sunlight is partially obscured.

During a total solar eclipse, the moon casts its umbra upon Earth's surface; that shadow can sweep a third of the way around the planet in just a few hours. Those who are fortunate enough to be positioned in the direct path of the umbra will see the sun's disk diminish into a crescent as the moon's dark shadow rushes toward them across the landscape.

During the brief period of totality, when the sun is completely covered, the beautiful corona — the tenuous outer atmosphere of the sun — is revealed. Totality may last as long as 7 minutes 31 seconds, though most total eclipses are usually much shorter.

On Jan. 4, 2011, the moon passed in front of the sun in a partial solar eclipse - as seen from parts of Earth. Here, the joint Japanese-American Hinode satellite captured the same breathtaking event from space. The unique view created what's called an annular solar eclipse.
On Jan. 4, 2011, the moon passed in front of the sun in a partial solar eclipse - as seen from parts of Earth. Here, the joint Japanese-American Hinode satellite captured the same breathtaking event from space. The unique view created what's called an annular solar eclips
Partial solar eclipses

A partial solar eclipse occurs when only the penumbra (the partial shadow) passes over you. In these cases, a part of the sun always remains in view during the eclipse. How much of the sun remains in view depends on the specific circumstances.

Usually the penumbra gives just a glancing blow to our planet over the polar regions; in such cases, places far away from the poles but still within the zone of the penumbra might not see much more than a small scallop of the sun hidden by the moon. In a different scenario, those who are positioned within a couple of thousand miles of the path of a total eclipse will see a partial eclipse.

The closer you are to the path of totality, the greater the solar obscuration. If, for instance, you are positioned just outside of the path of the total eclipse, you will see the sun wane to a narrow crescent, then thicken up again as the shadow passes by.

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Which is NOT a characteristic of background radiation?A.) It is generally safe
B.) It includes cosmic rays
C.) It burns and causes lung cancer
D.) It occurs naturally in the environment

Answers

The one among the following choices that is not a characteristic of background radiation is that it burns and causes lung cancer. The correct option among all the options that are given in the question is the third option or option "C". The other options given in the question are all true in case of background radiation.

Answer:

C.) It burns and causes lung cancer

Explanation:

A thin layer of turpentine (n=1.472) is floating on water (n=1.333). Light of wavelength 589 nm initially traveling in air is incident on the turpentine at an angle of 24.8° measured with respect to the air-turpentine interface. What is the light's refraction angle in the turpentine?

Answers

The angle of refraction of the light in turpentine will be $\boxed{38.1^\circ}$ .

Explanation:

Given:

The refractive index of the turpentine is $1.472$ .

The refractive index of the water is $1.333$ .

The angle that the light makes with the surface of the turpentine is $24.8^\circ$ .

Concept:

As the light is incident on the surface of the turpentine at the air-turpentine interface, the light gets refracted from the surface. The refraction of light occurs due to change in the refractive index at the air-turpentine surface.

The angle of the refracted ray after undergoing refraction is given by the Snell's law.

$\boxed{n_1sin\,i=n_2sin\,r}$

Here, $n_1$ is the refractive index of first medium, $n_2$ is the refractive index of second medium, $i$ is the angle of incidence and $r$ is the angle of refraction.

The angle of incidence is the angle made by the light from the normal to the surface. So, in this case, the angle of incidence will be $(90^\circ-24.8^\circ)$ i.e. $65.2^\circ$ .

Substitute the values in above expression.

$\begin{aligned}(1)sin\,(65.2^\circ)&=(1.472)sin\,(r)\nr&=sin^(-1)\left((1)/(1.472)sin\,(65.2^\circ)\right)\n&=sin^(-1)(0.616)\n&\approx38.1^\circ\end{aligned}$

Thus, The angle of refraction of the light in turpentine will be $\boxed{38.1^\circ}$ .

Learn More:

1. How does the reflection differ from refraction and diffraction brainly.com/question/3183125

2. The reason for the refraction of light at air water interface brainly.com/question/3095091

3. Approximate length of the unsharpened pencil brainly.com/question/6140057

Answer Details:

Grade: High School

Subject: Physics

Chapter: Refraction

Keywords:

thin layer, turpentine, Snell's law, refraction, air, interface, normal, incident, light, refracted, refraction, refraction angle.

Answer:

16.6 degrees

Explanation:

We can solve the problem by using Snell's law for refraction:

$n_1 sin \theta_1 = n_2 sin \theta_2$

where:

$n_1 = 1.00$ is the index of refraction of the first medium (air)

$\theta_1 = 24.8^(\circ)$ is the angle of incidence

$n_2 = 1.472$ is the index of refraction of the second medium (turpentine)

$\theta_2$ is the angle of refraction of light in turpentine

By re-arranging the equation and using the numbers, we find

$sin \theta_2 = (n_1)/(n_2) sin \theta_i = (1.0)/(1.472) sin 24.8^(\circ)=0.285\n\theta_2 = sin^(-1) (0.285)=16.6^(\circ)$

The basic unit for mass is thea. gram.
c. cubic meter.
b. metric ton.
d. meter.

Answers

Answer: The correct answer is option a.

Explanation:

Basic unit to measure mass is defined as the unit which is commonly used to measure the mass of an object.

From the given options,

Option a: Grams is a unit which is used to measure mass and it is the commonly used unit.

Option b: Cubic meter is the unit which is used to measure the volume of an object.

Option c: Metric ton is a unit which is used to measure the mass of an object but this unit is not commonly used. hence, this is not basic unit to measure mass.

Option d: Meter is the unit which is used to measure length.

From the above information, the correct answer is option a.

gram according to the metric system

5. An ion consist of 12 electrons and 11 proton. What is the charge
on the ion?

Answers

Answer:

-1

Explanation:

Electrons have a negative charge and protons have a positive charge. (+11) + (-12) = -1

In which of the following situations would the least work have been done?A. A 100-N force lifts an object 3 m.
B. A 250-N force moves an object 1 m.
C. A 25-N force moves an object 8 m.
D. A 600-N force is applied to an object and moves it 0 m.

Answers

Work = (magnitude of the force) x (distance in the direction of the force)

A 100-N force lifts an object 3 m. ==> (100 x 3) = 300 joules

B. A 250-N force moves an object 1 m. ==> (250 x 1) = 250 joules

C. A 25-N force moves an object 8 m. ==> (25 x 8) = 200 joules

D. A 600-N force is applied to an object
and moves it 0 m. ==> (600 x 0) = no work
Winner ! Least work.

Suppose you want to separate the leaves, acorns, and twigs from a pile of soil. Filtration and distillation are two processes of separating mixtures. Explain which process you would use and why.Have only 30 minutes to answer!!!!!
I will mark brainliest!

Answers

filtration b/c you can use different size filters

Mark him brainliest! XD

(your welcome btw)

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