Pretty shore its nose and mouth
True........don't blame me if i'm wrong.<span />
Explanation:
because the acceleration is negative, this indicates a deceleration (or slowing down) . Hence we can say that:
The car is decelerating (slowing down), i.e its velocity is decreasing, at a constant rate of 5m/s².
Answer:
Wavelength of the light is 750 nm.
Explanation:
Given that,
Spacing between the lines, ![d=2000\ nm=2\times 10^{-6}\ m](https://tex.z-dn.net/?f=d%3D2000%5C%20nm%3D2%5Ctimes%2010%5E%7B-6%7D%5C%20m)
Order of the grating, n = 2
The second order is formed at an angle of 48.5°. The equation of diffraction grating is given by :
![d\ sin\theta=n\lambda](https://tex.z-dn.net/?f=d%5C%20sin%5Ctheta%3Dn%5Clambda)
![\lambda=\dfrac{d\ sin\theta}{n}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cdfrac%7Bd%5C%20sin%5Ctheta%7D%7Bn%7D)
![\lambda=\dfrac{2\times 10^{-6}\times sin(48.5)}{2}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cdfrac%7B2%5Ctimes%2010%5E%7B-6%7D%5Ctimes%20sin%2848.5%29%7D%7B2%7D)
![\lambda=7.48\times 10^{-7}\ m](https://tex.z-dn.net/?f=%5Clambda%3D7.48%5Ctimes%2010%5E%7B-7%7D%5C%20m)
![\lambda=748\ nm](https://tex.z-dn.net/?f=%5Clambda%3D748%5C%20nm)
or
![\lambda=750\ nm](https://tex.z-dn.net/?f=%5Clambda%3D750%5C%20nm)
So, the wavelength of the light is 750 nm. Hence, this is the required solution.
Answer:
Their discoveries both had to do with the relationship of the earth to the sun and universe. That the earth wasn't the centre of the universe and that the sun didn't rotate round the earth but rather the other way.
Explanation:
Nicolaus Corpenicius (19 February 1473 - 24 May 1543) was a scientist, astronomer and renaissance era polymath, who was fascinated with stars. He was the first to formulate a model of the universe that had the sun at the centre of the universe instead of the earth. It was such a groundbreaking discovery. Corpenicus is often referred to as the father of Modern Astronomy.
Galileo Galilie (15 February 1564- 8 January 1642) was an italian physics philosopher who was famous for his discovery that the earth rotated round the sun. it was a big deal in his time, because, the prevailing thought in his day, was that the earth was the centre of the universe and the sun rotated round the verse. Though Corpenicus was the first to discover and publish it. Further discoveries and inventions by Galileo proved corpenicus as true.