No, the car travels 1 metre in 5s at the start which is 0.2m/s, while the second meter it travels one metre in 8 seconds which is 0.125 m/s, the speed changes therefore it is not constant during the two metres the car travels
I think it would be B. 90 dB
True. For example the Big Bang theory; no one knows what really happened, but based on evidences that were found, it was found as a good way to explain the world's origin.
Everything in presence is moving. That is the most essential naturally visible thing to think about the universe. In this way, consider a youthful star and any sensible measure of material about it. Regardless of the possibility that it was by one means or another equally, arbitrarily separated in a circle about the youthful star and moving in any case, the star and its gravitational impacts will rule. So its immense mass turns in a given plane and its gravity field twists fundamentally spacetime in that plane and less so in whatever another plane. In any case, the development of the star drags the only things that are important around it step by step into its rotational plane.
Answer:
v= 1.71 m/s
Explanation:
Given that
Distance between two successive crests = 4.0 m
λ = 4 m
T= 7 sec
T is the time between 3 waves.
3 waves = 7 sec
1 wave = 7 /3 sec
So t= 7/3 s
We know that frequency f
f= 1/t= 3/7 Hz
Lets take speed of the wave is v
v= f λ
f=frequency
λ=wavelength
v= 3/7 x 4 = 12 /7
v= 1.71 m/s