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The bombardment of nitrogen with alpha particles produces oxygen and?
- Beta particle
- Alpha particle
From the atomic and mass number of nitrogen, helium and oxygen, write the equation and balance it as number of protons and neutron must remain same after nuclear reaction.
7N14 + 2He4 —-> 8O17 …. In order to balance this equation the accompanying particle with oxygen must be 1H1 (A proton).
Physics of Solids
A wire of cross section A and length l is subjected to load L. A second wire of the same material with an area 2A and length 2l is subjected to the same load L. If extension for first wire is X and for second wire is Y, find the ratio X/Y?
Change in length is directly proportional to l/A. If we increase both the length and area by two times the change in length would be same as the original wire.
Heat & Thermodynamics
If velocity of gas particles for two gases is same. The pressure is directly proportional to? Assume volume of the container is same.
- Mass of gas molecule
- Absolute temperature
- Size of piston on the container
- Both A & B
Both A & B
P is directly proportional to KE = 1/2mv2. If v is same for two different gases then P depends on the m of the gas molecules. Pressure is also directly proportional to absolute temperature as K.E is directly proportional to temperature.