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In concise physics it is written that one can prove Newton's first and third laws of motion using his second law. I can prove the first one. Can anyone tell me how to prove the third law? |
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| asked by Anurag Hooda (akhooda) 7 years ago |
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+ 1 more questions by akhooda
I have a question that my friend asked me:
Consider two heating devices A and B which use a wire of high resistance to produce heating effect.
Let the Resistance of A be x and that of B be 2x
So B should produce more heat.(as the resistance of wire is double)
But V = IR(so I is inversely proportional to R)
So let the current in A be y, so the current in B should be y/2
According to H = I^2RT
Heat produced is directly proprtional to the SQUARE of I(current)
So the heat produced by B must be less than that by A.
Which heater produces more heat? |
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| asked by Anurag Hooda (akhooda) 7 years ago |
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In Newton's first law of motion.... Is it okay if we write it as.... unless an external "unbalanced" force is applied on it. This statement is right but will they deduct marks for it being not exactly same to the def. given in the text book? |
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| asked by Anurag Purohit (anurag2001) 7 years ago |
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How does resistance depend on the area of cross section of a conductor? |
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| asked by Ansh Thamke (ansh_cr7) 7 years ago |
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Is osterd's law there in syllabus?
If yes then please explain in short. |
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| asked by Peeyush Mishra (it_is_peeyush) 7 years ago |
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what is the energy change during respiration?pls answer asap |
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| asked by Papu Papu (loosu) 7 years ago |
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explain "critical angle of diamond is 24" |
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| asked by Siddharth dubey (siddharth33) 7 years ago |
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WORKING OF THE CRT
Loads of people have trouble understanding this so I thought I'd help make it a little simpler :]
1) Filament heats the Cathode.
2) Cathode gets charged and emits the electrons
3) Grid(situated between Anode and Cathode) directs the entry of electrons
4) Anode provides Kinetic energy to the electrons
5) Deflecting plates direct the electrons to the flourascent screen.
This is the process of how an electrical signal is converted into a visual signal. Please correct me if I made any mistake.
Hope I helped :] |
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| asked by Delta Vortex (legofigure11) 7 years ago |
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Suresh applies a force of 6kgf to draw a 4.8kg bucket of water from a well using a single fixed pulley. Assuming all extra force is used to overcome frictional forces, calculate MA, VR, eff.
ans should be 0.8 MA, VR is 1 and eff. 80% right? |
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| asked by Nishant Shah (nishantshahroxx) 7 years ago |
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what is the exact meaning of power rating ? |
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| asked by Sanya Srivastava (sanyasrivastava) 7 years ago |
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