Solubility. The material’s chemical composition is not changed.
While the ball is held 20 meters above the floor,
Potential energy = (mass) (gravity) x (height) =
(0.5 kg) x (9.8 m/s²) x (20 m) = 98 joules.
When it's dropped and reaches 1/2 of its initial height, it has half as much
potential energy. The rest has turned into kinetic energy = <em>49 joules.
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Want to know what else you can figure out ? Watch this . . .
<u> Kinetic energy = (1/2) x (mass) x (speed)²</u>
49 joules = (1/2) x (0.5 kg) x (speed)²
Divide each side by (0.25 kg): 49 joules / 0.25 kg = speed²
Take the square root of each side: 7/0.5 = speed = <em><u>14 meters per second</u></em>
That's the speed of the ball after falling 10 meters !
How cool is that !
Answer:
Orbital period, T = 1.42 years
Explanation:
It is given that,
Orbital period of a solar system planet, 
The orbital period of the planet can be calculated using third law of Kepler's. It is as follows :
M is the mass of the sun
r = 1.42 AU
So, the solar-system planet that has an orbital period of 8 years would have an orbital radius of about 1.42 AU.
Giant alien planets known as "hot Jupiters<span>" can induce wobbles in their parent stars that may lead to the wild, close </span>orbits<span> seen by </span>astronomers. ... Giant alien planets known as "hot Jupiters<span>" </span>orbit<span> their stars much closer than Mercury </span>does<span> the sun</span>
