Use the conservation of angular momentum; angular momentum at the beginning = angular momentum at the end
Conservation of angular momentum:
I1 w1 = I2 w2
Where I is the moment of inertia. For a sphere, I=2/5 m R^2. Substituting into the equation above we get
w2 = I1 w1 / I2 = w1 m1 R1^2 / (m2 R2^2)
w2 = w1 4 * (R1/R2)^2
= 4*(1)*(7E5/7.5)^2
= 3.48E10 revs/(17days)
= 2.04705882 x 10^9 revs/sec
Answer:
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Answer:
the density of gold is 19.3 g/cc
<h2>Answer:</h2>
The feature of an object affects its weight are given below
- mass of the object
- location of the object
- how much force Earth exerts on the object
<h2>Explanation:</h2>
Weight of the body is equal to the product of gravity and the mass of it so weight is dependent upon mass. The more the mass, the more is the weight. In the same way the location of the object differs if the location is far from the earth. Similarly gravity is the force with which earth attracts everything towards its center therefore we can say that if the object moves away from the earth center the weight decreases eventually..
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