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| From: harshaktg | Reply 261 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 45 |
Heat is directly proportional to the square of the current
We know that:
V = I2RT
So from this formula, we can know that:
Heat is directly proportional to the square of the current.
Posted at: Wed Dec 22 13:56:56 2010 (GMT)
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| From: harshaktg | Reply 262 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 46 |
Heat is directly proportional to the resistance
We know that:
V = I2RT
From this above given formula, we can know that:
The heat is directly proportional to the resistance.
So when the heat increases the resistance increases and vice versa.
Posted at: Wed Dec 22 13:59:16 2010 (GMT)
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| From: harshaktg | Reply 263 of 310 | Reply | View replies (1)
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| Subject: Contributed Answer/Explanation to Q. 48 |
The answer is clearly given below in the explanation
The amount of heat energy required to raise the temperature of a given mass
of a substance through 1°C( 1K).
Posted at: Wed Dec 22 14:01:30 2010 (GMT)
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| From: harshaktg | Reply 264 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 48 |
The answer is clearly given below in the explanation
The amount of heat energy required to raise the temperature of a given mass
of a substance through 1°C( 1K).
The SI unit is J°C or JK
Posted at: Wed Dec 22 14:02:14 2010 (GMT)
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| From: harshaktg | Reply 265 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 49 |
The answer is clearly given below in the explanation
delta Q = m * c * delta T
Posted at: Wed Dec 22 14:04:40 2010 (GMT)
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| From: harshaktg | Reply 266 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 50 |
Concave lens
Posted at: Wed Dec 22 14:05:18 2010 (GMT)
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| From: harshaktg | Reply 267 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 53 |
When the number of neutrons are greater than the number of protons
Posted at: Wed Dec 22 14:06:27 2010 (GMT)
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| From: harshaktg | Reply 268 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 60 |
The answer is clearly given below in the explanation
Oscilloscope
TV
Computer monitors
Posted at: Wed Dec 22 14:08:27 2010 (GMT)
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| From: himanshu95 | Reply 269 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 53 |
when the no of neutrons become 1.5 times the number of protons
Posted at: Thu Jan 6 06:08:37 2011 (GMT)
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| From: himanshu95 | Reply 270 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 56 |
radioactive sucstances are used to sterilize bandages, syringes,etc in
hospitals and also to kill the miligant cells of tumour. The harmful effect
is that they can pass through the body and causr immense biological damage
like cancer,etc
Posted at: Thu Jan 6 06:12:59 2011 (GMT)
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| From: himanshu95 | Reply 271 of 310 | Reply | View replies (1)
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| Subject: Contributed Answer/Explanation to Q. 24 |
12.8 Joules
mass = 64g = 0.064speed = 20m/s Kinetic Energy = 1/2 mv*v
0.5* 0.064*20*20
12.8 JAssuming that there is no loss of energy the kinetic energy
at ground will change into potential energy at the highest point according
ti the law of conservation of energy Potential Energy = 12.8J Posted at: Thu Jan 6 06:20:50 2011 (GMT)
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| From: himanshu95 | Reply 272 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 24 |
12.8 Joules
mass = 64g = 0.064speed = 20m/s Kinetic Energy = 1/2 mv*v
0.5* 0.064*20*20
12.8 JAssuming that there is no loss of energy the kinetic energy
at ground will change into potential energy at the highest point according
to the law of conservation of energy Potential Energy = 12.8J Posted at: Thu Jan 6 06:21:22 2011 (GMT)
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| From: hafi | Reply 273 of 310 | Reply | |
| Subject: not bad |
This ans is complicated Posted at: Sun Jan 9 10:47:17 2011 (GMT)
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| From: argon | Reply 274 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 19 |
The required diagram is shown below:
Posted at: Tue Jan 11 14:25:27 2011 (GMT)
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| From: digant | Reply 275 of 310 | Reply | View replies (2)
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| Subject: Contributed Answer/Explanation to Q. 1 |
Nm-Newton meter...
Posted at: Sun Jan 16 15:45:43 2011 (GMT)
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| From: digant | Reply 276 of 310 | Reply | View replies (1)
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| Subject: Contributed Answer/Explanation to Q. 2 |
Kg m/sec2
Posted at: Sun Jan 16 15:46:44 2011 (GMT)
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| From: digant | Reply 277 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 5 |
electrical-heat and electrical-sound
Posted at: Sun Jan 16 15:47:32 2011 (GMT)
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| From: jacleen1234 | Reply 278 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 2 |
newton
Posted at: Sun Jan 23 06:24:52 2011 (GMT)
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| From: jacleen1234 | Reply 279 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 1 |
kgm/s
Posted at: Sun Jan 23 06:27:18 2011 (GMT)
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| From: jacleen1234 | Reply 280 of 310 | Reply | |
| Subject: Contributed Answer/Explanation to Q. 1 |
kgm/s
Posted at: Sun Jan 23 06:27:20 2011 (GMT)
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