Question & Answer: Page 1

Akshay sheokand asks : if two trains are coming towards each other at a distance of 100m. length of trains are 60m and 80m traveling at the speed of 50m/s and 40m/s respectively.in how much time they will cross each other.rnrnplease explain briefly.

Tag : time,nplease,traveling,coming,speed,explain,distance,length,briefly,trains

Category : Grade 10 | On : 2012-01-26 08:23:54

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Sourav mukherjee says :

27/01/2012 07:38:02

'Time of Crossing ' means the time between the instances when the engines meet and the the instance when the end of the last compartments meet total distance to be covered by each train:(60+80)m=140m relative velocity:(50+40)m/s=90m/s therefore, time taken=140/90s=1.56s now if u want to find the total time taken by each train to cross the other then add (100/50=2s) and (100/40=2.5s)respectively to 1.56 to get the ans

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Chhandita chavan asks : how is the licking of dog to that of cat different? i need a scientific answer.

Tag : answer,licking,scientific

Category : Grade 10 | On : 2010-12-17 09:52:29

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Nishant banga says :

18/12/2010 10:52:16

because dog is different than cat

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Pankaj gupta asks : 1.IF Pth term of an A.P is q and qth tem of an AP is p then prove that (p+q) term is 0

Tag : term,prove

Category : Grade 10 | On : 2010-12-09 05:30:29

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Ashish negi says :

11/12/2010 10:54:27

GIVEN:

a+(p-1)d=q -- (1) &

a+(q-1)d=p -- (2)

subtracting (2) from (1)

we get , d = -1

now adding (1) & (2)

2a+(p+q-2)d = p+q

2a+(p+q-2) * -1 = p+q since d = -1

2a-p-q+2 = p+q

2a = 2(p+q-1)

a = p+q-1

a - (p+q-1) = 0

a + (p+q-1)d = 0 since d = -1

which is the (p+q)th term & is equal to 0.

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Pankaj gupta asks : WHAT IS SPECTRUM OF LIGHT.

Tag : light,spectrum

Category : Grade 10 | On : 2010-12-05 10:22:14

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Kopal kotak says :

05/12/2010 05:59:16

spectrum is d seven colours showed by d polychromatic light.

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Palakjain07 asks : a wire of resistance 2ohm is bend into circle of radius 1m.the same wire is connected acros the diameter of the circle. find the equivalent resistance across the 2 ends of diameter.

Tag : radius,ends,wire,acros,resistance,diameter,connected,bend,circle,equivalent

Category : Grade 10 | On : 2010-05-17 07:55:10

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Kanhaiya singh says :

17/06/2010 12:43:20

Eq Resistance = 1/ (1+1)= 1/2 ohm

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