Answer:
Check the correctness of the relation c=1 √μ0∈0 where the symbols have their usual meaning. check-circle.
Answer:
Part b)
h = 78.5 m
Part c)
v = 39.24 m/s
Explanation:
Part b)
If ball need t = 0 to t = 4 s then height of the tower is the total displacement of the ball in t = 4 s interval
here if ball start from rest
then its displacement is given as



Part c)
Speed of the bearing at the end of the motion of the ball



Answer:
work done on desk = m g h = 105 * 9.81 * 2.46 = 2534 Joules
Explanation:
so work in = 2534 / 0.875 = 2896 Joules
that is your 648 times distance your hand moved holding the rope
2896 = 648 * x
4.47 meters
I think maybe a typo, 648 N is too big, maybe 64.8 ? Any block and tackle system does better than that.
Answer:
Everything around you is made of matter, including the clothes you wear, the food you eat, and everything you touch. Even the air you breathe is made of matter. Air is a mixture of several kinds of atoms and molecules, including oxygen molecules. Skin is mostly made of collagen molecules.
Explanation:
hope this helps you