Answer:
There are an estimated over 10,000 bird species that exist in our world
Explanation:
The most notable types include humming birds, which have incredibly fast heart beats of up to 1,260 beats per minute.
There are also a group of birds that are flightless and cannot fly, which include Ostriches, which are also the tallest and heaviest living birds. In fact an ostrich is the closest ancestor to a Tyrannosaurus Rex.
Overall, there are many amazing birds out there! Hope this helped a little!
Answer: Marshes can be formed by tides in lowland areas near a coast
Always happy to help.
Explanation:
Answer:
Increase in agricultural productivity due to mechanized farming techniques
Increase in settlement areas due to improved water delivery and storage methods
Increase in urbanization due to globalization
Explanation:
Answer:
Two stars (a and b) can have the same luminosity, but different surface area and temperature if the following condition is met:
(T_a^4)(R_a^2) = (T_b^4)(R_b^2)
Explanation:
The luminosity of a star is the total energy that produces in one second. It depends on the size of the star and its surface temperature.
L = σ(T^4)(4πR^2)
L is the luminosity f the star, T is the temperature of the surface of the star and R is its radius.
Two stars can have the same luminosity if the relation between the radius and the surface temperature is maintained.
To see this lets suposed you have 2 stars, a and b, and the luminosities of each one of them:
L_a = σ(T_a^4)(4πR_a^2)
L_b = σ(T_b^4)(4πR_b^2)
you can assume that L_a and L_b are equal:
σ(T_a^4)(4πR_a^2) = σ(T_b^4)(4πR_b^2)
Now, you can cancel the constants:
(T_a^4)(R_a^2) = (T_b^4)(R_b^2)
as long as this relation between a and b is true, then the luminosity can be the same.
Answer:
When the side of the earth that faces the moon experiences a high tide, the side of the earth that is opposite from the moon will have a<u> high tide.</u>
Explanation:
During the rotation of Earth , moon pulls the Earth , since it is close to Earth .
As moon pulls Earth , it also pulls the water in the oceans , and water can move quite easily and the ocean's water tries to bulge towards the direction of the moon . This process is known as tidal force .
Due to this tidal force , some portion of the ocean will bulge out , and this bulge is referred to as high tide.
