Answer:
Dimitri Mendeleev
Explanation:
This man started the development of the periodic table, by arranging elements by atomic mass.
Solids have the highest density. Then comes liquid and the less dense one is gas.
Answer:
28.73 m from the base of the cliff collide happen
Explanation:
Equation for ball dropped from 50 cliff is reaches distance x in t seconds isi given by

stone is thrown up from the bottom with speed u=24 m/s . it reaches distance y when stone collide with ball.(g is negative here)

we know that total distance traveled by ball and stone is 50 m

adding equation 1 and 2, we get time t

substitute this time in equation 2, we can get the required distance where they collide

28.73 m from the base of the cliff collide happen
Answer: Solid matter is one of the three main states of matter, along with liquid and gas. Matter is the "stuff" of the universe, the atoms, molecules and ions that make up all physical substances. In a solid, these particles are packed closely together and are not free to move about within the substance.
All matter exists as solids, liquids, or gases. These are called the states of matter. Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid).
Explanation: