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Taya2010 [7]
2 years ago
11

The asteroid ceres lies at an average distance of 414 million kilometers from the sun. The period of revolution of ceres around

the sun is approximately

Physics
2 answers:
nikitadnepr [17]2 years ago
8 0

Answer:

Answer is 1.156x10^23 sec

Explanation:

According to kepler's law, the square of the period of revolution is proportional to the cube of the distance within planets.

At a distance r of 414 million kilometers I.e 414x10^6 km, period calculation is shown in the image below.

7nadin3 [17]2 years ago
6 0

Answer:

T2 = 1680,4 days

Explanation:

Kepplers law:

\frac{T^{2} }{a^{3} }  = constant

For Earth:

T1 = 365 days ; a1 = 149 597 870 700 m

For Ceres:

T2 = ? days ; a1 = 414*10^{9}  m

Then:

\frac{T1^{2} }{a1^{3} }  = \frac{T2^{2} }{a2^{3} }  ----> T2 =  T1*\sqrt{\frac{a2^{3}}{a1^{3}}}

Replacing values:

T2 = 1680,4 days

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3 years ago
A ball is thrown upward with a speed of 40 m/s. Approximately how much time does it take the ball to travel from the release loc
zvonat [6]

I'm going to assume that this gripping drama takes place on planet Earth, where the acceleration of gravity is 9.8 m/s².  The solutions would be completely different if the same scenario were to play out in other places.

A ball is thrown upward with a speed of 40 m/s.  Gravity decreases its upward speed (increases its downward speed) by 9.8 m/s every second.

So, the ball reaches its highest point after (40 m/s)/(9.8 m/s²) = <em>4.08 seconds</em>. At that point, it runs out of upward gas, and begins falling.

Just like so many other aspects of life, the downward fall is an exact "mirror image" of the upward trip.  After another 4.08 seconds, the ball has returned to the height of the hand which flung it.  In total, the ball is in the air for <em>8.16 seconds</em> up and down.

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3 years ago
. While a person lifts a book of mass 2 kg from the floor to a tabletop, 1.5 m above the floor, how much work does the the perso
viktelen [127]

Answer:

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b) - 29.4 J

Explanation:

Given:

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Height above the floor, h = 1.5 m

Now,

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