Light as a wave: Light can be described (modeled) as an electromagnetic wave. ... This changing magnetic field then creates a changing electric field and BOOM - you have light. Unlike many other waves (sound, water waves, waves in a football stadium), light does not need a medium to “wave” in.
Explanation:
Answer:
The speed of the car is 20.84 m/s.
Explanation:
Given that,
The distance covered by the car, d = 150 km
Time, t = 7200 s
We need to find the speed of the car. We know that the speed of an object is given by total distance divided by total time taken. Mathematically,
![v=\dfrac{d}{t}\\\\v=\dfrac{150\times 10^3\ m}{7200\ s}\\\\v=20.84\ m/s](https://tex.z-dn.net/?f=v%3D%5Cdfrac%7Bd%7D%7Bt%7D%5C%5C%5C%5Cv%3D%5Cdfrac%7B150%5Ctimes%2010%5E3%5C%20m%7D%7B7200%5C%20s%7D%5C%5C%5C%5Cv%3D20.84%5C%20m%2Fs)
So, the speed of the car is 20.84 m/s.
Answer:
![2.537\times 10^{6}\ years](https://tex.z-dn.net/?f=2.537%5Ctimes%2010%5E%7B6%7D%5C%20years)
Explanation:
Distance to Andromeda galaxy
![2.537\times 10^{6}\ ly=2.537\times 10^{6}\times c\times y](https://tex.z-dn.net/?f=2.537%5Ctimes%2010%5E%7B6%7D%5C%20ly%3D2.537%5Ctimes%2010%5E%7B6%7D%5Ctimes%20c%5Ctimes%20y)
Speed of light is
![c=3\times 10^8](https://tex.z-dn.net/?f=c%3D3%5Ctimes%2010%5E8)
Time is given by
![t=\dfrac{Distance}{Speed}\\\Rightarrow t=\dfrac{2.537\times 10^{6}\times c\times y}{c}\\\Rightarrow t=2.537\times 10^{6}\ y](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7BDistance%7D%7BSpeed%7D%5C%5C%5CRightarrow%20t%3D%5Cdfrac%7B2.537%5Ctimes%2010%5E%7B6%7D%5Ctimes%20c%5Ctimes%20y%7D%7Bc%7D%5C%5C%5CRightarrow%20t%3D2.537%5Ctimes%2010%5E%7B6%7D%5C%20y)
Hence, the light from Andromeda left
ago
Yr average speed would be about 1151.75 really depends