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if they ask ri to find then we should do 
u=speed in vacum /speed in medium
or
aUm = speed in vacum /"
asked by Somay Vaidh (somay2003) 6 years ago
2
a calorimeter of mass 50g and specific heat capacity 0.42J/gC contains water at 20C a piece of metal mass 20g and specific heat capacity 0.3J/gC at 100C is added, the final temperature is 22C find the mass of water used
asked by Rajni Rastogi (arnav21) 6 years ago
3
Hey guys Problems related to lens are not there in the scope do we have to do?
The formula 1/v - 1/u = 1/f . These sums are not there in scope
asked by Panna Thakkar (panna2431) 6 years ago
3
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

+ 1 more questions by aayushjoshi  

who are moderators in board and what they do
asked by Rtstud (mdarfath) 6 years ago
1
Unit of intensity
asked by Gangadharanpillai Gangadharanpillaik (jgpvgp) 6 years ago
4

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