B would be first cause they are tall then
c cause they are
short then D can they are tall then A
This is what I would say
Answer:
Part a)
Part b)
Part c)
F = 2.7 N
Explanation:
Part a)
As we know that the rotational kinetic energy of the merry go round is given as
here we know that
Now we have
Part b)
Now we know that work done due to torque = change in kinetic energy
Part c)
In order to stop it in four revolutions we have
F = 2.7 N
Applied force in an opposite direction.
To measure the magnetic strength of a bar magnet use a gauss meter for the test.
<h3>
Test for magnetic strength of a bar magnet</h3>
The strength of a magnet is determined by the pull force exerted by the magnet when it is pulled away from a magnetic material like steel.
Use the following steps to determine the strength of a magnet;
- Get a gauss meter and magnet, take both where no other magnetic material can be located.
- Place the gauss meter directly on on the surface of one of the magnet's poles.
- Locate the needle on the gauss meter and find the corresponding heading. If the needle points far left or far right, then strength of the magnetic field is high and vice versa.
Learn more about strength of magnet here: brainly.com/question/26257705
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-- Depending on the time of the year, the sun's rays strike Earth
most directly somewhere between the Tropic of Cancer and the
Tropic of Capricorn.
That's a belt around the Earth's "middle" called the "Tropic Zone".
The equator is in the middle of it, the Tropic of Cancer is 23.5° North
of the equator, and the Tropic of Capricorn is 23.5° degrees South of it.
The sun's rays can never be totally direct, straight down onto the Earth's
surface, anywhere outside this belt.
-- The sun's rays strike Earth least directly wherever, and whenever,
the sun is setting.