1. | \(4x+4y\) | 2. | \(4x-4y\) |
3. | \(4y-4x\) | 4. | \(y-x\) |
Fusion reaction takes place at a higher temperature because:
1. | atoms get ionized at high temperatures. |
2. | kinetic energy is high enough to overcome the Coulomb repulsion between nuclei. |
3. | molecules break up at a high temperature. |
4. | nuclei break up at a high temperature. |
If a proton and anti-proton come close to each other and annihilate, how much energy will be released?
1. | \(1.5 \times10^{-10}~\text{J}\) | 2. | \(3 \times10^{-10}~\text{J}\) |
3. | \(4.5 \times10^{-10}~\text{J}\) | 4. | None of these |
1. | \(6\) and \(8\) | 2. | \(6\) and \(6\) |
3. | \(8\) and \(8\) | 4. | \(8\) and \(6\) |
1. | Electron and antineutrino |
2. | Positron and antineutrino |
3. | Positron and neutrino |
4. | Electron and positron |
1. | Decreases by \(4\) and mass number remains same. |
2. | Remains the same but the mass number increases by \(4\). |
3. | Remains the same but mass number decreases by \(8\). |
4. | Increases but mass number remains same. |