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| From: poulomi24 | Reply 1 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 29 |
When a body is partially or wholly immersed in a liquid,it experiences a
upward buoyant force,which is equal to the weight of the liquid displaced by
the immersed part of the body.
Posted at: Thu Mar 4 15:58:54 2010 (GMT)
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| From: gauravshah10 | Reply 2 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 14 |
1=1.2
number of waves produced in 1 second=frequency if the wave(f)
velocity(v)=24m/s
wavelength(w)=20
v=f * w
24=f*20
f=24/20
f=1.2
Posted at: Sun Mar 7 08:47:58 2010 (GMT)
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| From: priyanka_naik | Reply 3 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 24 |
the rate of change of momentum of a body is directly proportonal to the
force applied on it and this change in momentum takes place in the direction
of the force.
f = ma
Posted at: Sun Mar 7 11:04:31 2010 (GMT)
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| From: priyanka_naik | Reply 4 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 53 |
alpha rays
Posted at: Sun Mar 7 13:48:03 2010 (GMT)
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| From: abhishek100031 | Reply 5 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 9 |
45,90
Posted at: Wed Apr 21 10:49:21 2010 (GMT)
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| From: abhishek100031 | Reply 6 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 37 |
answer=
2 × 108
Posted at: Wed Apr 21 10:53:19 2010 (GMT)
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| From: abhishek100031 | Reply 7 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 39 |
Total internal reflection
Posted at: Wed Apr 21 10:56:01 2010 (GMT)
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| From: harsimran | Reply 8 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 4 |
1:1
Posted at: Tue Sep 28 11:51:52 2010 (GMT)
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| From: harsimran | Reply 9 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 5 |
1:2
Posted at: Tue Sep 28 11:52:43 2010 (GMT)
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| From: harsimran | Reply 10 of 22 | Reply | View replies (1)
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| Subject: Contributed Answer/Explanation to Q. 8 |
it is defined as-
critical angle is the angle of incidence corresponding to which the angle of
refraction is 90.
Posted at: Tue Sep 28 11:54:48 2010 (GMT)
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| From: harsimran | Reply 11 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 8 |
it is defined as-
critical angle is the angle of incidence in denser medium corresponding to
which the angle of refraction in denser medium is 90.
Posted at: Tue Sep 28 11:55:27 2010 (GMT)
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| From: harsimran | Reply 12 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 12 |
SONAR stands for sound navigating and ranging.It is based on the principle
of echo.
Posted at: Tue Sep 28 11:57:04 2010 (GMT)
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| From: harsimran | Reply 13 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 35 |
convex lens
Posted at: Tue Sep 28 12:00:56 2010 (GMT)
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| From: harsimran | Reply 14 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 36 |
The ratio of sine of angle of incidence to sine of angle of refraction is
constant for the pair of given media.This constant is called the refractive
index of second medium with respect to the first.This is called Snell's law.
Posted at: Tue Sep 28 12:03:15 2010 (GMT)
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| From: aakshika | Reply 15 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 14 |
120
V=W.F
24=(20/100) .F
24=F/5
F=24*5=120
Posted at: Sun Dec 5 18:09:44 2010 (GMT)
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| From: wwwww | Reply 16 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 10 |
ans
except yellow all other
Posted at: Sat Dec 25 17:31:17 2010 (GMT)
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| From: wwwww | Reply 17 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 10 |
except yellow all others colors
Posted at: Sat Dec 25 17:32:32 2010 (GMT)
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| From: subhasree | Reply 18 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 1 |
so as to make the scissors a speed multiplier and the shear a force
multipier.
blades longer than handles signify that the effort arm is more than the load
arm thus M.A. > 1 and due to which effort applied is less than the
load.hence it is used as a speed multiplier.but in case of the shears it is
just the reverse. Posted at: Sun Jan 2 05:37:31 2011 (GMT)
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| From: subhasree | Reply 19 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 3 |
kinetic to potential energy
at the mean position it has kinetic energy while at the extreme position it
has potential energy Posted at: Sun Jan 2 05:42:38 2011 (GMT)
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| From: gud1 | Reply 20 of 22 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 6 |
....as below....
Because the molecules of ice on melting occupy the intermolecular spaces
between the molecules of water,the level of water does not rise. Posted at: Sun Jan 2 21:08:08 2011 (GMT)
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