Answer:
c
Explanation:
the question answered itself.
Answer:
v = 2.85 m/s
Explanation:
By the law of similarity of the triangle we can say
here we know that
height of man = 2 m
let the distance of man from spotlight = x
distance of wall from spotlight = 12 m
height of image is let say "y"
so we will have
now we have
here we know
x = 4 m
now we have
Answer:
It takes 1600 seconds or hours to travel a distance of 20 km.
Explanation:
Given:
Speed of the motorcycle,
Distance traveled by the motorcycle,
We know that,
∴
Plug in 20 km for and 45 km/h for . Solve for time.
⇒ Time =
Therefore, the time taken to travel a distance of 20 km is 1600 seconds or hours.
So you know the speed of a wave, and speed is how much the wave moves per second. This wave travels 3x10^8 meters per second. So to find how for you traveled you need to know how many seconds the wave traveled for, 20 minutes is equal to 1200 seconds (times 20 minutes by 60). Then times the seconds by the speed (3x10^8 m/s)x(1200 s) = 3.6x10^11 meters