(a) why is 103 to 105°c the drying temperature generally used for total solids analysis? under what conditions and why is 180 used as the drying temperature? (c) why is 550°c chosen as the combustion temperature in the volatile solids analysis? what possible problems would result if a lower or a higher temperature were used?

the answer would be   dignified - apex

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.