Answer:
Option (c) is correct.
Explanation:
The apparent change in the frequency of light due to the relative motion between the source and the observer is called Doppler's effect.
When the source is moving towards the observer which is at rest, the apparent frequency increases and if the observer is moving away the frequency of sound decreases.
It occurs for both light and sound.
So, to explain the blue shift of light in the universe is due to the Doppler's effect of light.
Answer:
b. Icy objects that form a tail as they come close to the Sun
Explanation:
Acording to NASA comets are cosmic snowballs made out of frozen gases, rock and dust, they usually are the size of a small town and contain water and organic compounds due to the collisions with Earth and other planets. When its orbit brings it close to the sun, it heats up, spewding dust and gases forming a tail that streches away from the sun, they also have a glowing head that is larger than most planets.
<em>Considering this information we can conclude that the correct answer is b. Icy objects that form a tail as they come close to the Sun.</em>
I hope you find this information useful and interesting! Good luck!
Answer:
1. First-quarter moon.
2. New moon.
3. Full moon.
4. 13 degrees.
5. 29 1/2 days.
Explanation:
A moon can be defined as the natural satellite of planet earth that shines as a result of the sun's reflected light, as it revolves around the earth from west to east in 29½ days.
1. First-quarter moon: a visible half-circle.
2. New moon: darkest phase of the moon.
3. Full moon: when the the Earth is between the sun and the moon.
4. 13 degrees: this is a measurement of how far the moon advances each day in orbit.
5. 29 1/2 days: the time the Earth must rotate to return to same position relative to the moon.
The length of the inclined plane is approximately 12 ft
The situation forms a right angle triangle.
<h3>Right triangle</h3>
Right triangle have one of its angle as 90 degrees.
Therefore,
The length of the inclined plane is the hypotenuse of the triangle. The length of the inclined plane can be found using trigonometric ratios.
height = 4 ft
angle(∅) = 19.45°
sin 19.45 = 4 / h
h = 4 / 0.33298412235
h = 12.0125847796
h = 12 ft
Therefore, the length of the inclined plane is approximately 12 ft
learn more on inclined plane:brainly.com/question/14163589?referrer=searchResults
Answer:
1. Astronomical telescope.
2. Terrestrial telescope.
3. Galilean telescope.
Explanation: