Answer:
B. I looked it up I hope it's right
Explanation:
i hope this helps.
They almost entirely reside within galaxies because quasars are a subset of blackholes with a large and fast enough accretion disk to generate a beam of interstellar material perpendicular to itself. This typically only occurs in the largest black holes at the center of galaxies (supermassive blackholes) or at least stellar black holes---which still occur within galaxies because the material is necessary to form them.
Answer:
both train meet at 9.00 pm
Explanation:
let t is the time after 1st train start
we know distance = time * speed
D_1 = 40*t
D_2= 60*(t-3) ( as second train depart after 3hr gap)
we know
distance by one train = distance traveled by 2nd train i.e
D_1 = D_2
40*t=60*(t-3)
40*t = 60*t - 60*3
20*t = 180
t = 9
hence both train meet at 9.00 pm
We are given
m = 80 kg
d = 32 m
We are asked for the velocity to keep the man from falling when he is at the top
The formula to use is
mg = mv²/r
g = v²/r
v = √rg
v = √(32/2)(9.81)
v = 156.96 m/s
