Related Questions

একটি পানিপূর্ণ কুয়ার গভীরতা 20m ও ব্যাস 2 m. কুয়াটিকে পানি শূণ্য করার জন্য 5 HP এর একটি পাম্প লাগানো হল। অর্ধেক পানি তোলার পর পাম্পটি নষ্ট হয়ে গেল। বাকি পানি তোলার জন্য একই ক্ষমতা সম্পন্ন আর একটি পাম্প লাগানো হল। প্রথম পাম্প দ্বারা সম্পাদিত কাজের পরিমান নির্ণয় কর।(The depth and diameter of a water filled well are 20 m and 2 m respectively. An engine of 5 HP is attached to pump out the water. The pump was ruined after emptying half of the water. Then another pump of same capacity was attached to pump out rest of the water. Determine the work done by first pump.) 
A 2.54 × 104 J
B 1.44 × 104 J
C 2.34×104 J
D 1.54 × 104 J
E 1.54 ×104 J
Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?
A 72
B 75
C 84
D 96
A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump
A Develops a lower head
B Capacity is reduced
C Requires more power
D All of the above
A boat has a crack in its bull which is leaking water into the boat and could pump which can pump the water out in 8 hours . If the boat is 168 km away from the shore and the pump is running what is the minimum speed the boat should run at so that it can reach the shore before sinking?
A 5km./hour
B 6 km/hour
C 7 km/hour
D 8km/hour
Proton-pump inhibitors are
A Omeprazole
B Pantoprazole
C Sucralfate
D Famotidine
E Misoprostol
Adverse effects of proton pump inhibitors -
A Gl effect
B Kidney disease
C Iron malabsorption
D Hair loss
E Breathlessness
নিচের কোন আয়নটি o2- এর সম-ইলেকট্রন বিশিষ্ট? (Which ion of the following has the same number of electrons as an o2- ion?) 
A K+
B Mg2+
C Cl-
D S2-
An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall. This is the working principle of a
A PH meter
B Polarimeter
C Chromatograph
D Polarograph
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
A 10
B 20
C 70
D 100
The pH scale measures the hydrogen ion concentration in a solution. What does P mean in this?
A Power
B Potenz, which means power in German
C Potential, which means comfort in German
D Potency, which means power in German

Next steps