BT va cham hat nhan.can giai dap 2

[Yennhi10594]

[kydhhd]

$m_{\alpha }.v_{\alpha }=m_{x}.v_{x}\Rightarrow m_{\alpha }W_{\alpha }=m_{x}W_{x}\Rightarrow 4.W_{\alpha }=234.3,8.10^{-2}\Rightarrow W_{\alpha }=2,22 MeV$

[kydhhd]

26. làm giống câu 25 ta có: $W_{T}=\frac{m_{\alpha }}{m^{T}}W_{\alpha }; W_{T}+W_{\alpha }=4,8\Rightarrow W_{\alpha }=\frac{4,8}{1+\frac{m_{\alpha }}{m_{T}}}=2,06MeV$