At night, when that part of Earth is facing away from the Sun<span>, </span>space<span> looks </span>black<span>because there is no nearby bright source of light, like the </span>Sun<span>, to be scattered. </span>If<span> you were on the Moon, which has no atmosphere, the sky would be </span>black<span> both night and day.</span>
True. If the amount displaced is more than the mass, it floats. If the amount is less than the mass, it will sink.
According to sources, the most probable answer to this query is that the next atom in the system, if the first is reduced, is oxidised. Oxidation is where the atoms gain charge or electrons. Thank you for your question. Please don't hesitate to ask in Brainly your queries.
Answer:
1 m/s
Explanation:
2 to 3 second interval would be zero.
3 to 4 is 2 m/s
so average is 1 m/s
This looks so scary just because there are so many parts to it.
Take them one at a time:
<u>First piece:</u>
From rest, accelerates 1.8 m/s² for 15 sec.
Speed at the end of the 15 sec = 1.8 x 15 = 27 m/s
Distance covered = (average speed) x (time) = (13.5) x (15) = 202.5 meters
<u>Middle piece:</u>
Starts this piece at 27 m/s.
Runs at constant speed for 35 sec.
Covers (27 x 35) = 945 meters
Finishes this piece (15 + 35) = 50 seconds after leaving the first station
Finishes this piece (202.5 + 945) = 1147.5 meters from the first station.
<u>Last piece:</u>
Starts this piece 50 seconds after leaving the first station,
1147.5 meters from it, still moving at 27 m/s.
Decelerates at 2.0 m/s² .
--> It takes 27/2.0 = 13.5 seconds to come to a stop.
--> Distance covered during this piece = (average speed) x (time)
= (13.5 m/s) x (13.5 sec) = 182.25 meters
Finishes this piece (50 + 13.5) = 63.5 seconds after leaving the first station
Finishes this piece (1147.5 + 182.25) = 1,329.75 m from the first station
Distance between the stations (along the track) = 1,329.75 meters.
Average speed = (total distance) / (total time) = 1,329.75 / 63.5 = 20.941 m/s.
I sure hope I didn't make any stupid arithmetic blunders here,
because I really don't feel like going back and checking it.
Let me know, and I'll fix them.