Answer
When the light goes from one medium to another medium with higher refractive index the velocity of the ray decreases, wavelength of the ray also decreases.
But the frequency of the ray when it enters the medium of higher refractive index remain same.
So, we can conclude that speed of ray and wavelength decrease but frequency remain unchanged.
Answer:
B
Explanation:
ran a mile 2 minutes faster
2.392 hector liters is equal to 239.2 liters
Distance in the y direction.
Answer:
m = 4.4 × 10³ kg
Explanation:
Given that:
The total yearly energy is 4.0 × 10²⁰ J
The amount of mass that provides this energy can be determined by using the formula:
E = mc²
where;
c = speed of light in free space = (3 × 10⁸)
4.0 × 10²⁰ = m × (3 × 10⁸)²
![m = \dfrac{4.0 \times 10^{20} }{(3\times 10^8)^2}](https://tex.z-dn.net/?f=m%20%3D%20%5Cdfrac%7B4.0%20%5Ctimes%2010%5E%7B20%7D%20%7D%7B%283%5Ctimes%2010%5E8%29%5E2%7D)
m = 4.4 × 10³ kg