a. Earth's orbit would not change.
Explanation:
The force that keeps the Earth in circular motion around the Sun is the gravitational force between the Earth and the Sun, whose magnitude is given by:
where
is the gravitational constant
m is the mass of the Earth
M is the mass of the Sun
r is the distance between them
From the equation, we observe that this force depends only on three factors:
- the mass of the Earth
- the mass of the Sun
- their separation
If the Sun is replaced by a black hole of the same mass, none of these factors would change (the central mass M would remain the same), therefore the gravitational force F would not change, and therefore the orbit of the Earth would not change.
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Yes,it's true ok? So how have you been doing
Answer:
A. Energy
Explanation:
You can change energy from one form to another when you lift your arm or take a step. Energy is used to move matter. In this scenario, the matter would be you.
In the process of spinning ,fibres from a mass of cotton are drawn out and twisted. This brings the tiny fibres together to form long and twisted threads called yarn. ... Spinning of yarn on a large scale is done by using spinning machines in mills or factories.
This source is from https://classnotes.org.in/class-6/science/fibre-to-fabric/making-of-fabric/