The answer is 1.52.
N = C (speed of light) / actual speed
n = index of refraction
Only 10 Kg of secondary consumers can be supported by the ecosystem.
There exists such a thing as the 10% rule in the transfer of energy in biomass from one trophic level to another. This rule ultimately controls the mass of biomass that is available at the next higher trophic level.
This rule state that only 10% of the energy in biomass is transferred to the next trophic level. By this rule, only 10% of the energy in the plant material is transferred to the carnivore population. Therefore, only 10 Kg of secondary consumers can be supported by the ecosystem.
Learn more about trophic level: brainly.com/question/13267087
Answer:
B
Explanation:
Gravity is when objects are pulled down to earth
Answer:
2.31J
Explanation:
the energy for a spring system is given by:
where 
is the spring constant: 
and 
is the distance stretched from the equilibrium position.
In the first case 
so the energy to stretch the spring 1.81cm is:
and for the second case, the energy to stretch the spring 5.79cm:
so to answer a) we must find the difference between these energies:
