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| From: mjh_syed | Reply 1 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 4 |
Newton
Posted at: Mon Feb 8 09:34:14 2010 (GMT)
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| From: ratchet | Reply 2 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 2 |
According to the principle of conservation of energy energy can neither be
created nor be destroyed but changes from one form to another form
Posted at: Sun Feb 14 02:44:29 2010 (GMT)
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| From: priyanka_naik | Reply 3 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 4 |
kg m/s
Posted at: Sun Mar 7 14:12:05 2010 (GMT)
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| From: priyanka_naik | Reply 4 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 20 |
work is said to be done only when a force applied on a body makes a body
move
Posted at: Sun Mar 7 14:13:28 2010 (GMT)
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| From: sumit1007 | Reply 5 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 28 |
specific heat of a substance may be defined as the ammount of heat required
to raise the temperature of unit mass of a substance through unit degree.its
s.i unit is J/gm/degree centigrade
if mass=1,temperature=1 then from equation Q=m*c*t
or Q=c*1*1
or Q=c
or c=Q/mass * temperature
Posted at: Fri Mar 19 08:05:22 2010 (GMT)
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| From: aaaa123 | Reply 6 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 22 |
the amount of work done is known as energy
Posted at: Sun Mar 28 06:37:43 2010 (GMT)
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| From: amishajaha | Reply 7 of 21 | Reply | View replies (1)
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| Subject: Contributed Answer/Explanation to Q. 13 |
4.86
Posted at: Tue May 11 06:12:07 2010 (GMT)
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| From: amishajaha | Reply 8 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 13 |
4.86 s
Posted at: Tue May 11 06:12:48 2010 (GMT)
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| From: harsimran | Reply 9 of 21 | Reply | View replies (1)
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| Subject: Contributed Answer/Explanation to Q. 4 |
kg m s-1
Posted at: Mon Sep 27 14:12:47 2010 (GMT)
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| From: harsimran | Reply 10 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 4 |
it is-
kg m s-1
Posted at: Mon Sep 27 14:13:44 2010 (GMT)
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| From: harsimran | Reply 11 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 7 |
angle of incidence at AB is 0 and at AC is 30
it is 0 at AB because it is normal to the surface AB and 30 at AC because
180- (90+60)=30
Posted at: Mon Sep 27 14:17:09 2010 (GMT)
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| From: harsimran | Reply 12 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 9 |
concave lens
Posted at: Mon Sep 27 14:18:22 2010 (GMT)
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| From: harsimran | Reply 13 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 13 |
4.86 s
d=850 m
s=350 ms-1
t=?
s=2d/t
t=2d/s
=850 x 2/350
=4.86 s
Posted at: Mon Sep 27 14:24:50 2010 (GMT)
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| From: harsimran | Reply 14 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 16 |
advantages of electromagnet over a bar magnet are-
1.Its magnitude can be changed.
2.Its polarities can be changed.
Posted at: Mon Sep 27 14:26:36 2010 (GMT)
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| From: harsimran | Reply 15 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 25 |
pressure
Posted at: Mon Sep 27 14:27:55 2010 (GMT)
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| From: harsimran | Reply 16 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 32 |
because mirror absorb some potion of light where as the prism does not
absorb any light and reflects the light with the full intensity
Posted at: Mon Sep 27 14:31:59 2010 (GMT)
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| From: harsimran | Reply 17 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 33 |
gamma rays, x rays, ultra violet rays, infra red rays
Posted at: Mon Sep 27 14:33:57 2010 (GMT)
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| From: harsimran | Reply 18 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 37 |
resonance
Posted at: Mon Sep 27 14:34:30 2010 (GMT)
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| From: harsimran | Reply 19 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 39 |
forced vibrations
Posted at: Mon Sep 27 14:35:04 2010 (GMT)
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| From: harsimran | Reply 20 of 21 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 40 |
its pitch increases
Posted at: Mon Sep 27 14:36:42 2010 (GMT)
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