Answer:When scientists focus on climate from before the past 100-150 years, they use records from physical, chemical and biological materials preserved within the geologic record. Organisms (such as diatoms, forams and coral) can serve as useful climate proxies. Other proxies include ice cores, tree rings, and sediment cores.
Explanation:
Answer:
The collision occurs at a height of 1/3 of the total height of cliff.
Explanation:
The situation is represented in the attached figure:
For the stone dropped from top of cliff we have
Initial velocity of drop= 0 m/s.
Now the time at which it attains a velocity of 2v is obtained from first equation of kinematics as

Thus the distance it covers in this time can be calculated using third equation of kinematics as

For the stone thrown upwards the velocity at collision is give as 'v' thus the velocity at which it is thrown upwards can be calculated by first equation of kinematics as

The height over which it changes it's velocity from '3v' to 'v' can be again obtained from third equation of kinematics as


Thus the collision occurs at at a fraction of 1/3 of height.
Answer:
George Washington was the first president of the USA
Explanation:
Answer:
they run a elecition and who ever has the most votes by certain date is the president
I believe the answer is: the language dance <span>maturation
</span>the language dance <span>maturation refers to the process of contiioning the language learning about the proper saying of each language in order to prepare them for the normal day to day use.
Children who are exposed to </span>the language dance <span>maturation are more liekly to have good command for the language faster compared to normal children</span>