Answer:
True
Explanation:
It's a bit hard to explain, so you can watch a youdube video on it or something.
Answer with Explanation:
We are given that
Mass of rider=m=77 kg
Mass of bike =m'=7.3 kg
Initial velocity,u=9.3 m/s
Final velocity,v=6 m/s
A.Change in velocity=v-u=6-9.3=-3.3 m/s
Total mass,M=m+m'=77+7.3=84.3 kg
Change in momentum=
B.Impulse=Ft=Change in momentum=-278.19kg m/s
C.Time,t=13.2 s

Using the formula



F=

D.


A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.
Answer: Sound waves are a waves of compression and rarefaction, by which sound is propagated in an elastic medium such as air.
Explanation:
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
Answer:
0.167 m
Explanation:
By the definition of the velocity if a wave ,
The velocity of light, v, is the product of its wavelength, λ , and its frequency, f.
V= fλ
frequency - number of occurances in a unit time
Wavelength - distance between corresponding points of two consecutive waves
(check the graph for wavelength)
