I think it's The fossil record. The same animal fossil is in Africa and South America. The animal could have not swim across so its the fossil record
Answer:
B
Explanation:
You always want to test as many samples as possible
The softest sound a human ear can hear is at 0dB. Sounds above 130dB causes pain.
To solve this problem we will use the heat transfer equations, to determine the amount of heat added to the body. Subsequently, through the energy ratio given by Plank, we will calculate the energy of each of the photons. The relationship between total energy and unit energy will allow us to determine the number of photons
The mass of water in the soup is 477g
The change in temperate is
Use the following equation to calculate the heat required to raise the temperature:
Here,
m = Mass
c = Specific Heat
The wavelength of the ration used for heating is
The number of photons required is the rate between the total energy and the energy of each proton, then
This energy of the photon is given by the Planck's equation which say:
Here,
h = Plank's Constant
c = Velocity of light
Wavelength
Replacing,
Now replacing we have,
Therefore the number of photons required for heating is