The ozone layer blocks the rays. But the ozone layers now has holes.
5 stars please!
Answer:
The density of the rock is
(D) is correct option.
Explanation:
Given that,
Force = 20.0 N
Density = 1000 kg/m³
Suppose the scale new reads 12.5 N
We need to calculate the mass of rock
Using formula of force
Put the value into the formula
Scale reads 12.5 N after rock is totally submerged so mass of rock after submerged
We need to calculate the mass of rock
Using formula of force
Put the value into the formula
The scale reads 12.5 N = 1.25 kg so it is displacing 0.75 kg of water
We need to calculate the volume of rock using volume of water it displaces:
Using formula of volume
We need to calculate the density of the rock
Using formula of density
Put the value into the formula
Hence, The density of the rock is
Answer:
Explanation:
The radio signal travels to us at the speed of light, so at a speed of
The distance between the spaceship and the Earth is
Since the signal travel by uniform motion, we can write
where
t is the time the signal needs to reach the Earth
By solving the equation for t, we find
A recessive genotype needs to be homozygous (Both alleles the same) for the phenotype to show. The common school example of course being Eye colour of Blue or Brown. If someone is a carrier, then that means they have the allele needed for the condition, but they don't show it because they are heterozygous for it, so the dominant allele shows instead. Because only person carries the recessive allele, when they reproduce, there will be no recessive allele in the second person to connect with the recessive allele in the first person, so at best the offspring can only be a carrier too.
Answer:
The index of refraction of the liquid is n = 1.33 equivalent to that of water
Explanation:
Solution:-
- The index of refraction of light in a medium ( n ) determines the degree of "bending" of light in that medium.
- The index of refraction is material property and proportional to density of the material.
- The denser the material the slower the light will move through associated with considerable diffraction angles.
- The lighter the material the faster the light pass through the material without being diffracted as much.
- So, in the other words index of refraction can be expressed as how fast or slow light passes through a medium.
- The reference of comparison of how fast or slow the light is the value of c = 3.0*10^8 m/s i.e speed of light in vacuum or also assumed to be the case for air.
- so we can mathematically express the index of refraction as a ratio of light speed in the material specified and speed of light.
- The light passes through a liquid with speed v = 2.25*10^8 m/s :
- The index of refraction of the liquid is n = 1.33 equivalent to that of water.