The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. Energy released in the process of fusion is due to mass defect. It is also called `Q`-value. `Q = Delta mc^(2), Delta m =` mass defect. Fusion reaction takes place at aboutA. `9 xx 10^(2) K`B. `3 xx 10^(3) K`C. `3 xx 10^(4) K`D. `3 xx 10^(6) K`

The source of energy of stars is nuclear fusion. Fusion reaction occur

1.	The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. Energy released in the process of fusion is due to mass defect. It is also called `Q`-value. `Q = Delta mc^(2), Delta m =` mass defect. Fusion reaction takes place at aboutA. `9 xx 10^(2) K`B. `3 xx 10^(3) K`C. `3 xx 10^(4) K`D. `3 xx 10^(6) K`
Answer» Correct Answer - D

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During the transformation of `._(c )X^(a)` to `._(d)Y^(b)` the number of `beta`-particles emitted are a. `d + ((a - b)/(2)) - c` b. `(a - b)/(c )` c. `d + ((a - b)/(2)) + c` d. `2c - d + a = b`A. a. `d + ((a - b)/(2)) - c`B. b. `(a - b)/(c )`C. c. `d + ((a - b)/(2)) + c`D. d. `2c - d + a = b`
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