Tycho Brahe ( 1546 - 1601 ) was a Danish astronomer known for his accurate astronomical and planetary observations. Tycho tried to produce a model with the best of both Ptolemy ( earth-centered solar system ) and Copernicus ( sun-centered solar system ).
Answer: B ) observation.
Answer: 7 is C,8 is B,9 is B,
Explanation: Give me a Like
The work done is 46 J
Explanation:
The work done by a force pushing a body is given by
where
F is the magnitude of the force
d is the displacement of the body
is the angle between the directions of the force and of the body
In this problem:
F = 23 N
d = 2 m
(we assume the force is parallel to the displacement)
Therefore, the work done is
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Answer:
The tension increases to four times its original value.
Explanation:
v = Velocity
r = Radius
m = Mass of stone
The centripetal force is
The tension will balance the centripetal force
The new tension will be 4 times the old tension