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strojnjashka [21]
3 years ago
13

Which scientist was the first to propose the heliocentric model of the universe

Physics
2 answers:
andreyandreev [35.5K]3 years ago
6 0
Hi there! :D

Which scientist was the first to propose the heliocentric model of the universe


Copernicus
iris [78.8K]3 years ago
6 0

Answer:

Nicholas Copernicus

Explanation:

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Elan Coil [88]

Answer:

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7 0
3 years ago
A 100-kg spacecraft is in a circular orbit about Earth at a height h = 2RE .
maria [59]

To solve this problem it is necessary to apply the concepts related to the conservation of the Gravitational Force and the centripetal force by equilibrium,

F_g = F_c

\frac{GmM}{r^2} = \frac{mv^2}{r}

Where,

m = Mass of spacecraft

M = Mass of Earth

r = Radius (Orbit)

G = Gravitational Universal Music

v = Velocity

Re-arrange to find the velocity

\frac{GM}{r^2} = \frac{v^2}{r}

\frac{GM}{r} = v^2

v = \sqrt{\frac{GM}{r}}

PART A ) The radius of the spacecraft's orbit is 2 times the radius of the earth, that is, considering the center of the earth, the spacecraft is 3 times at that distance. Replacing then,

v = \sqrt{\frac{(6.67*10^{-11})(5.97*10^{24})}{3*(6.371*10^6)}}

v = 4564.42m/s

From the speed it is possible to use find the formula, so

T = \frac{2\pi r}{v}

T = \frac{2\pi (6.371*10^6)}{4564.42}

T = 8770.05s\approx 146min\approx 2.4hour

Therefore the orbital period of the spacecraft is 2 hours and 24 minutes.

PART B) To find the kinetic energy we simply apply the definition of kinetic energy on the ship, which is

KE = \frac{1}{2} mv^2

KE = \frac{1}{2} (100)(4564.42)^2

KE = 1.0416*10^9J

Therefore the kinetic energy of the Spacecraft is 1.04 Gigajules.

8 0
3 years ago
When the Moon orbits Earth, what is the centripetal force?
nata0808 [166]

Answer:

Gravity is the centripetal force when the moon orbits the earth.

5 0
2 years ago
a light-year is ____ A. the amount of time it takes light to get to the nearest star B. the distance light travels in a day C. t
Vinil7 [7]
The Answer is C. the distance light travels in a year
6 0
3 years ago
Read 2 more answers
Globalization is the process of
Delvig [45]

Answer: Globalization is the process of interaction and integration among people, companies, and governments worldwide.

Explanation:

5 0
3 years ago
Read 2 more answers
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