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How is focal length related to r.i.?
asked by Momo (zenab13) 6 years ago
1
if the value of g is not given.
which one should be used :- 9.8 OR 10????
asked by Atharva Raibagi (iamatharva62) 6 years ago
3
hiiii,could someone help me with these qns??
1)in selina pg 46,qn 6
The bob of a simple pendulum is imparted a velocity of 5m/s when it is at its mean position.To what max vertical ht will it rise on reaching at its extreme position if 60% of its energy is lost in overcoming the friction of air??(Answer 0.75m)
plzz explain how to solve it.
2)pg;67 qn 2:
A fixed pulley is driven by a 100kg mass falling at a rate of 8.0m in 4s.It lifts a load of 75kgf.calc:
(a)the power input
(b)efficiency
(c)ht to which the load is raised in 4s.
I did the first part but dont know how to do the rest.Plzz help....
3)in selina,there are no experiments given for calorimetry.Then should I learn that???
plzz answer asap............
asked by Snigdha (silver2002) 6 years ago
3
Define one dioptre
asked by Tiara Elizabeth (thejtthomas) 6 years ago
4
Two medical uses of SONAR???
asked by Aayush Joshi (aayushjoshi) 6 years ago
7

+ 2 more questions by aayushjoshi  

who are moderators in board and what they do
asked by Rtstud (mdarfath) 6 years ago
1

+ 1 more questions by mdarfath  

Unit of intensity
asked by Gangadharanpillai Gangadharanpillaik (jgpvgp) 6 years ago
4

+ 1 more questions by jgpvgp  

I follow selina book and there has been a numerical from electricity chapter which seems a bit different-
The power rating of an electric bulb is 40W 220 V. Find the power when the potential difference is reduced to 200V.

Is the resistance taken constant here or the current?
asked by Prateek Mukherjee (prat172) 6 years ago
4

+ 1 more questions by prat172  

Does a rain drop reaches the with constant velocity ?? Give reason for your answer.
asked by Ansh Singh (anshkush) 6 years ago
4
Guys after the "ban' was lifted i just realized i can not only see respapers for free but also download them in pdf format.....!!! yahoooo
asked by ⚡The Flash⚡ (devanshu8) 6 years ago
2

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