Answer:
L/2
Explanation:
Neglect any air or other resistant, for the ball can wrap its string around the bar, it must rotate a full circle around the bar. This means the ball should be able to swing to the top position where it's directly above the bar. By the law of energy conservation, this happens when the ball is at the same level as where it's previously released vertically. It means the swinging radius around the bar must be at least half of the string length.
So the distance d between the bar and the pivot should be at least L/2
Answer:
Stars are at large distances that even light takes thousands of years to reach us from there.
for example, alpha centauri is 4300 light years away from earth and it is considered the nearest star to us, this means that light from there takes 4300 years to reach us and with a spaceships that can move with the speed of light is would take us 4300 years to get there which is imposible to live for that long.
hence, it is difficult to move between the stars.
I think the answer you’re looking for is
D)
-I hope this helps! Enjoy the rest of your day
Answer:
I think it’s B
I might be wrong tho
Answer: 950 Kg/m^3
Explanation: We can deduce from the Archimedes principle that there is a relation between the density and the volumes displaced, as follows:
Density*Volume= Mass
So for equilibrium Density of body= Density of water *Vw/Vb
Being Vw/Vb the relation between the displaced water and the body volume, and given the water density as 1000 Kg/m^3 we got:
Density(B)= 0.95 * 1000 Kg/m^3.
