Correct answer choice:
B. Earth-centered
Explanation:
Heliocentric theory is the planetary model in which the Earth and planets rotate around the Sun at the focus of the Solar System. Historically, Heliocentric theory was objected to geocentric theory, which set the Earth at the core. This approach was explained in sections by several cosmologists over various times, particularly Aristarchus, Copernicus, Kepler, and Galileo.
Answer:
The correct answer is option b, Earth centered
Explanation:
For the very first it was proposed by Copernicus that it is not the earth but sun which lies at the center of the system and rest all planets revolve around the sun. This sun centered model is known as heliocentric system and is also referred to as the modern view. This model was also helpful in solving two major queries instantly –
a) Varying brightness of planets
b) Retrograde motion.
B. Aquarius
C. centaurus
D. Sagittatius
How do stars locate in the galactic disk orbit the galactic center?
A. they do not orbit the galactic center.
B. they move in the circular orbits around the galactic center.
C. they bob up and down as they orbit the galactic center.
D. they orbit in elliptical orbits with random orientations.
The center of the Milky Way is in the direction of the constellation Sagittarius. The stars in the galactic disk move in a rosette pattern as they orbit the galactic center, which is neither completely circular nor random elliptical orbits.
The galactic center of the Milky Way is located in the direction of the constellation Sagittarius. The stars in the galactic disk orbit the galactic center much like how planets in our solar system orbit the sun. The movement of these stars is not completely circular, nor do they bob up and down or orbit randomly in elliptical paths. The actual orbit is more like a rosette pattern, not perfect circles but also not random orientations.
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The galactic center of the Milky Way is located in the direction of the constellation Sagittarius. Stars in the galactic disk orbit the galactic center in circular orbits.
The galactic center of the Milky Way is located in the direction of the constellation Sagittarius.
Stars in the galactic disk orbit the galactic center in circular orbits.
SEO keywords: galactic center, Milky Way, constellation, Sagittarius, galactic disk, circular orbits
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b) cooled
c) warmed
d) unchanged
When a refrigerant condenses, the surrounding air is warmed. The correct option is c.
The refrigerant is a working fluid in a refrigerator which is capable of changes of phase at low temperatures.
A refrigerator undergoes a vapor compression refrigeration cycle using the working fluid.
When a refrigerant condenses, the surrounding air is warmed.
Thus, the correct option is c.
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b. the force of weight on a bicycle
c. typing the computer key for the letter y
d. the force of a picture hanging on a nail
The best example of a compression force is the force of weight on a bicycle. The answer is letter B. A compression force is when the weight of the bicycle imposes a downward force to the ground and the ground imposes an upward force to the bicycle.
I took the test and got B) the force of weight on a bicycle correct
Answer:
current = 2.5A
Explanation:
We can use Ohm's law which states that V∝R so V=IR when the temperature is constant where V is the voltage (potential difference), I is the current and R is the resistance.
75= 30I
I= 75/30= 2.5A