Answer:
C. community
Explanation:
Community consists of a local residence, like a town.
Answer:
He will complete the race in total time of T = 10 s
Explanation:
Total distance moved by the sprinter in 2.14 s is given as



now the distance remaining to move

now he will move with uniform maximum speed for the remaining distance
so we will have


so the total time to complete the race is given as

Answer:
<em>The comoving distance and the proper distance scale</em>
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Explanation:
The comoving distance scale removes the effects of the expansion of the universe, which leaves us with a distance that does not change in time due to the expansion of space (since space is constantly expanding). The comoving distance and proper distance are defined to be equal at the present time; therefore, the ratio of proper distance to comoving distance now is 1. The scale factor is sometimes not equal to 1. The distance between masses in the universe may change due to other, local factors like the motion of a galaxy within a cluster. Finally, we note that the expansion of the Universe results in the proper distance changing, but the comoving distance is unchanged by an expanding universe.
Answer:
waving
Explanation:
it waves go to a beach and see water doesn't rest it waves
Answer:
part(a) 151 m
part(b) 1.073 m/s2
part(c) 16.7 secs
Explanation:Firstly the person applied brakes 0.5 secs after seeing the red light hence the distance traveled during this time is
d=v*t
d=18*0.5
d=9m
For part (a)
I have corrected this question and now
The person was 160m from the intersection before applying the brakes as he traveled 9m before the brakes
He is now 151 m from intersection as
s=160-9
s= 151 m
part (b)
As it is given that velocity of the car is 0 at the intersection so we use this information in kinematic equation

here u=18m/s and s=151

To calculate time we can use the acceleration equation
