The tank has a volume of 
, where 
is its height and 
is its radius.
At any point, the water filling the tank and the tank itself form a pair of similar triangles (see the attached picture) from which we obtain the following relationship:
The volume of water in the tank at any given time is
and can be expressed as a function of the water level alone:
Implicity differentiating both sides with respect to time 
gives
We're told the water level rises at a rate of 
at the time when the water level is 
, so the net change in the volume of water 
can be computed:
The net rate of change in volume is the difference between the rate at which water is pumped into the tank and the rate at which it is leaking out:
We're told the water is leaking out at a rate of 
, so we find the rate at which it's being pumped in to be
Answer:
A feature and a coin dropped from the same height falls at the same speed at the condition at free fall,both coin and feature gain same acceleration of 9.8m/s^2.
Answer:
is the liberation of electrons from an electrode by virtue of its temperature
Explanation:
The correct option is D.
The chemical formula AI2O3 given in the question above gives the following information:
1. The subscript 2 indicates that two atoms of aluminium are present in the compound.
2. The subscript 3 indicates that three atoms of oxygen are present in the chemical compound.
3. The chemical symbol Al indicate that aluminium is present in the compound.
4. The chemical symbol O indicates that oxygen is present in the compound.
5.The subscript 2 and 3 show the ratio in which aluminium and oxygen atoms combine together.<span />
