Answer:
Its speed decreases.
Explanation:
When light enters into water, its speed decreases (as well as its frequency). This is the reason why refraction (the bending of light when it changes media) occurs.
This can be proven mathematically.
Given that the refractive index of water is 4/3, we know that refractive index is the ratio of the speed of light in a vacuum to the speed of light in another medium.
Therefore,
4/3 = (speed of light in vacuum) / (speed of light in water)
Speed of light in a vacuum is 3 * 10^8. Hence,
Speed of light in water is:
v = (3 * 10^8) / (4/3)
v = 2.25 * 10^8 m/s
As we can see, the speed of light decreases in water.
Heat the tea because the heat make the tea's particles move around more dissolving the sugar quicker
Answer:
2.461
Explanation:
Let mass of Bonzo = m1
Mass of Ender =m2
When they push eachother from stationary position
Initial velocity of Bonzo = Vib=0 m/s
Final velocity of Bonzo = Vfb= 1.3 m/s
Initial velocity of Ender = Vie= 0 m/s
Final velocity of Ender = Vfe= -3.1 m/s
We know initial momentum = final momentum
==> m1Vib+m2Vie = m1Vfb+m2Vfe
==> 0+0= m1×1.3 +m2×(-3.1)
==> 1.3m1-3.1m2=0
==> 1.3 m1 = 3.2 m2
==> m1/m2 = 3.2/1.3
==> m1/m2 = 2.461
Equal to the angle of reflection.
Answer:
Photoelectric effect
Explanation:
In the photoelectric effect, when an x-ray strikes on a metal surface, the energy is completely absorbed by the metal. If the energy would be equal to or more than work function of metal, electron ejects out. The kinetic energy of the electron which is ejected depends on the energy of the incident radiation and work function of the metal.
