Maths-
General
Easy
Question
Two vertical poles 20m and 80m heigh stand apart on a horizontal plane The height of the point of intersection of the lines joining the top of each pole to the foot of the other is
The correct answer is:
Related Questions to study
chemistry-
5 mole of an ideal gas expand isothermally and irreversibly from a pressure of 10atm to 1atm against a constant external pressure of 1 atm. 
at 300 K is :
5 mole of an ideal gas expand isothermally and irreversibly from a pressure of 10atm to 1atm against a constant external pressure of 1 atm. at 300 K is :
chemistry-General
chemistry-
In the conversion of lime stone to lime, 
the values of 
and 
are 
and 
respectively at 
and 1 bar. Assuming, and do not change with temperature; temperature above which conversion of lime stone to lime will be spontaneous is
In the conversion of lime stone to lime, the values of and are and respectively at and 1 bar. Assuming, and do not change with temperature; temperature above which conversion of lime stone to lime will be spontaneous is
chemistry-General
chemistry-
Which of the following expressions is correct?
Which of the following expressions is correct?
chemistry-General
chemistry-
Which of the following is true for spontaneous process?
Which of the following is true for spontaneous process?
chemistry-General
chemistry-
ΔG for the reaction 
is -4.606 kcal. The value of equilibrium constant of the reaction at 227°C is
ΔG for the reaction is -4.606 kcal. The value of equilibrium constant of the reaction at 227°C is
chemistry-General
chemistry-
Driving force of a reaction is the
Driving force of a reaction is the
chemistry-General
chemistry-
If the inversion temperature of a gas is -80°C, then it will produce cooling under Joule-Thomson effect at
If the inversion temperature of a gas is -80°C, then it will produce cooling under Joule-Thomson effect at
chemistry-General
chemistry-
For a perfectly crystalline solid 
, where a and 
are constant. If 
is 0.40 J/K mol at 10 K and 0.92 J/K mol at 20 K, then molary entropy at 20 K is :
For a perfectly crystalline solid , where a and are constant. If is 0.40 J/K mol at 10 K and 0.92 J/K mol at 20 K, then molary entropy at 20 K is :
chemistry-General
chemistry-
Two mole of an ideal gas is expanded irreversibly and isothermally at 37°C until its volume is doubled and 3.41 kJ heat is absorbed from surroundings. 
(system +surroundings) is
Two mole of an ideal gas is expanded irreversibly and isothermally at 37°C until its volume is doubled and 3.41 kJ heat is absorbed from surroundings. (system +surroundings) is
chemistry-General
chemistry-
One mole of an ideal monoatomic gas at 27°C is subjected to a reversible isoentropic compression until final temperature reached to 327°C If the initial pressure was 
atm then find the value of In 
One mole of an ideal monoatomic gas at 27°C is subjected to a reversible isoentropic compression until final temperature reached to 327°C If the initial pressure was atm then find the value of In
chemistry-General
chemistry-
Calculate ΔS for 3 mole of a diatomic ideal gas which is heated and compressed from 298 K and 1 bar to 596 K and 4 bar.
Calculate ΔS for 3 mole of a diatomic ideal gas which is heated and compressed from 298 K and 1 bar to 596 K and 4 bar.
chemistry-General
chemistry-
Considering entropy(s) at a thermo dynamic parameter, the criterion for the spontanity of any process is
Considering entropy(s) at a thermo dynamic parameter, the criterion for the spontanity of any process is
chemistry-General
chemistry-
When a liquid evaporates, which is true about the signs of the enthalpy and entropy changes ?
When a liquid evaporates, which is true about the signs of the enthalpy and entropy changes ?
chemistry-General
chemistry-
When charcoal burns in air signs of ΔH and ΔS are 
When charcoal burns in air signs of ΔH and ΔS are
chemistry-General
chemistry-
What are the signs of the entropy change (+ or - ) in the following:
I) A liquid crystallises into a solid
II) Temperature of a crystalline solid is raised from 0 K to 115 K
III) 
IV) 
What are the signs of the entropy change (+ or - ) in the following:
I) A liquid crystallises into a solid
II) Temperature of a crystalline solid is raised from 0 K to 115 K
III)
IV)
chemistry-General
