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Andrews [41]
3 years ago
10

Which statement best defines work? A. Work is the time it takes to move an object once acted upon by a force. B. Work occurs whe

n balanced forces act on an object and cause movement in the direction of these forces. C. Work occurs when a force causes motion of an object, and this motion is in the same direction of the applied force. D. Work is the distance over time that an object moves once acted on by a force.
Physics
2 answers:
BigorU [14]3 years ago
4 0

a. work is the time it takes to move an object once acted upon by a force


Nitella [24]3 years ago
4 0
Work is best defined as occurring when a <span>force causes the motion of an object, and this motion is in the same direction of the applied force. Work can be calculated by the following formula: w = fxd or work equals force times distance.</span>
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The prefix kilo- means
kolezko [41]
Hello There!

Kilo means thousand.
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The moon Umbriel orbits Uranus (mass = 8.68 x 10^25 kg) at a distance of 2.66 x 10^8 m. What is Umbriel's orbital period (in hou
Whitepunk [10]

Answer:

T = 99.51 hour

Explanation:

Mass of Uranus, M=8.68\times 10^{25}\ kg

The moon Umbriel orbits Uranus at a distance of 2.66\times 10^8\ m

We need to find Umbriel's orbital period. Let it is T. Using Kepler's third law of motion to find it.

T^2\propto r^3\\\\T^2=\dfrac{4\pi^2r^3}{GM}\\\\T^2=\dfrac{4\pi^2\times (2.66\times 10^8)^3}{6.67\times 10^{-11}\times 8.68\times 10^{25}}\\\\T=358244.51\ s

As 1 hour = 3600 s

358244.51 s = 99.51 hour

Hence, Umbriel's orbital period is 99.51 hour.

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