$$N=N_0.2^{-\frac{t}{T}}=N_0.e^{-\lambda t}$$

$$N=N_0.\left(1-2^{-\frac{t}{T}}\right)$$

$$\Delta N=N_0.2^{-\frac{t}{T}}=N_0e^{-\lambda t}$$

$$\Delta N=N_0\left(1-2^{-\frac{t}{T}}\right)=N_0\left(1-e^{-\lambda t}\right)$$

$$m=m_0.2^{-\frac{t}{T}}$$

$$m=m_0.e^{-\lambda t}$$

$$m=m_0.\left(1-2^{-\frac{t}{T}}\right)$$

$$\Delta m=m_0.2^{-\frac{t}{T}}$$

$$\Delta m=m_0.\left(1-2^{-\frac{t}{T}}\right)$$

$$\Delta m=m_0\left(1-e^{-\lambda t}\right)$$

$$\Delta H=H_0.2^{-\frac{t}{T}}$$

$$\Delta H=H_0.\left(1-2^{-\frac{t}{T}}\right)$$

$$\Delta H=H_0\left(1-e^{-\lambda t}\right)$$

$$H=H_0.2^{-\frac{t}{T}}$$

$$H=H_0.e^{-\lambda t}$$

$$H=H_0.\left(1-2^{-\frac{t}{T}}\right)$$

$$H=\lambda.H_0$$

$$H=\lambda.N$$

$$H_0=\lambda.N_0$$

$$\Delta H=\lambda.\Delta N$$

$$\Delta m=Zm_p-\left(A-Z\right)m_n-m_X$$

$$\Delta m=Zm_p+\left(A-Z\right)m_n-m_X$$

$$E_{lk}=\Delta m.c^2$$

$$E_{lk}=\Delta m.931,5$$

$$E_{lkr}=E_{lk}.A$$

$$E_{lkr}=\frac{E_{lk}}{A}$$

$$N=\frac{N_A}{A}m$$

$$N_0=\frac{N_A}{A}.m_0$$

$$\Delta N=\frac{N_A}{A}\Delta m$$

$$m=\frac{A}{N_A}N$$

$$m_0=\frac{A}{N_A}.N_0$$

$$\Delta m=\frac{A}{N_A}.\Delta N$$

$$N_{con}=N_{\alpha}=N_{\beta}=N_0.2^{-\frac{t}{T}}$$

$$N_{con}=N_{\alpha}=N_{\beta}=N_0\left(1-2^{-\frac{t}{T}}\right)$$

$$m_{con}=\frac{A_{con}}{N_A}.N_{con}$$

$$m_{con}=\Delta m=m_0\left(1-2^{-\frac{t}{T}}\right)$$

$$\frac{m_{con}}{m_{me}}=\frac{A_{con}}{A_{me}}.\left(1-2^{-\frac{t}{T}}\right)$$

$$\frac{m_{con}}{m_{me}}=\frac{A_{con}}{A_{me}}.\left(2^{\frac{t}{T}}-1\right)$$

$$\lambda=\frac{\ln2}{T}$$

$$T=\frac{\ln2}{\lambda}$$

$$E=mc^2$$

$$E=mc$$

$$F=BIL\sin\theta$$

$$F=BIL\cos\theta$$

khi khi dòng điện vuông góc với từ trường: $$\theta=90^0$$

khi dòng điện song song từ trường: $$\theta=0\ hay\ 180^0$$

khi khi dòng điện vuông góc với từ trường: $$\theta=90^0$$ (Fmax = BIL)

khi dòng điện song song từ trường: $$\theta=0\ hay\ 180^0$$

$$\Phi=NBS\cos\alpha$$

$$\Phi=NBS\sin\alpha$$

khi $$\alpha=0^0$$ hay mp vuông góc với đường sức từ trường $$\left(\Phi_0=\Phi_{\max}=NBS\right)$$

khi $$\alpha=90^0$$ hay mp song song với đường sức từ trường

$$e_c=-\frac{\Delta\Phi}{\Delta t}$$

$$\left|e_c\right|=\left|\frac{\Delta\Phi}{\Delta t}\right|$$

$$i_c=\frac{\left|e_c\right|}{R}$$

$$i_c=\left|e_c\right|.R$$

$$I=\frac{I_0}{\sqrt[]{2}}$$

$$I_0=\frac{I}{\sqrt[]{2}}$$

$$U=\frac{U_0}{\sqrt[]{2}}$$

$$U_0=\frac{U}{\sqrt[]{2}}$$

$$E=\frac{E_0}{\sqrt[]{2}}$$

$$\Phi=\frac{\Phi_0}{\sqrt[]{2}}$$

$$E_0=\Phi_0.\omega$$

$$E_0=NBS\omega$$

$$E_0=\frac{E}{\sqrt[]{2}}$$

$$\omega=2\pi f=\frac{2\pi}{T}$$

$$f=\frac{1}{T}=\frac{\omega}{2\pi}$$

$$T=\frac{1}{f}=\frac{2\pi}{\omega}$$

$$P=RI^2$$

$$P=IU$$

$$P=\frac{U^2}{R}$$

$$P=At$$

$$P_0=RI_0^2$$

$$P_0=2P$$

$$P=\frac{P_0}{\sqrt[]{2}}$$

$$Q=A=Pt$$

$$Q=A=RI^2t$$

$$Q=A=IUt$$

$$Q=A=\frac{U^2}{R}t$$

$$\lambda=cT=\frac{c}{f}$$

$$\lambda=\frac{c}{T}=cf$$

$$i=I_0\cos\left(\omega t+\psi_i\right)$$

$$u=U_0\cos\left(\omega t+\psi_u\right)$$

$$i=I_0\cos\left(\omega t+\psi_i\right)$$

$$u=U_0\cos\left(\omega t+\psi_u\right)$$

$$\phi=\Phi_0\cos\left(\omega t+\alpha\right)$$

$$\phi=\Phi_0\sin\left(\omega t+\alpha\right)$$

$$e=E_0\sin\left(\omega t+\alpha\right)$$

$$e=E_0\cos\left(\omega t+\alpha-\frac{\pi}{2}\right)$$

$$\Delta\Phi=N\left(B_2-B_1\right)S\cos\alpha$$

$$\Delta\Phi=NB\left(S_2-S_1\right)\cos\alpha$$

$$\Delta\Phi=NBS\left(\cos\alpha_2-\cos\alpha_1\right)$$

$$\Delta\Phi=NBS\cos\left(\alpha_2-\alpha_1\right)$$

$$S_{tròn}=\pi R^2$$

$$S_{vuông}=cạnh\times cạnh$$

$$S_{hcn}=dài\times rộng$$

$$S_{tròn}=\pi\frac{d^2}{4}$$

$$Q=mc\Delta T=mc\Delta t$$

$$Q=mc\left(t_2-t_1\right)$$

$$Q=mc\left(T_2-T_1\right)$$

$$Q=\frac{mc}{T_2-T_1}=\frac{mc}{t_2-t_1}$$

$$Q_{nc}=\lambda.m_{nc}$$

$$Q_{hh}=L.m_{hh}$$

$$Q_{nc}=\lambda.m_{nc}$$

$$Q_{hh}=L.m_{hh}$$

$$T\left(K\right)=t\left(^0C\right)+273,15$$

$$T\left(K\right)\approx t\left(^0C\right)+273$$

$$T\left(K\right)=t\left(^0C\right)+273,16$$

$$\Delta U=A+Q$$

$$\Delta U=A-Q$$

$$\left|A\right|=Fd$$

$$\left|A\right|=p.\left|V_2-V_1\right|$$

$$\left|A\right|=\frac{F}{s}$$

$$n=\frac{m}{M}$$

$$n=\frac{N}{N_A}$$

$$\mu=\frac{N}{V}$$

$$\mu=N.V$$

$$pV=const$$

$$p\sim\frac{1}{V}$$

$$p_1V_1=p_2V_2$$

$$\frac{V_1}{T_1}=\frac{V_2}{T_2}$$

$$\frac{V}{T}=hằng\ số$$

$$V\sim T$$

$$\frac{V_1}{t_1}=\frac{V_2}{t_2}$$

$$\frac{V_1}{T_1}=\frac{V_2}{T_2}$$

$$\frac{pT}{V}=nR$$

$$\frac{pV}{T}=hằng\ số$$

$$pV=nRT$$

$$\frac{p_1V_1}{T_1}=\frac{p_2V_2}{T_2}$$

$$p=\frac{1}{3}\mu.m.\overline{v^2}=\frac{1}{3}D.\overline{v^2}$$

$$p=\frac{2}{3}\mu.W_đ$$

$$p=\frac{1}{3}\mu.W_đ$$

$$W_đ=\frac{1}{2}.m.\overline{v^2}$$

$$W_đ=\frac{3}{2}kT$$

$$W_đ=\frac{2}{3}kT$$

$$\overline{v^2}=\frac{3kT}{M}$$

$$\overline{v^2}=\frac{3RT}{m}$$

$$\overline{v^2}=\frac{3kT}{m}$$

$$\overline{v^2}=\frac{3RT}{M}$$

$$\sqrt[]{\overline{v^2}}=\sqrt[]{\frac{3kT}{M}}$$

$$\sqrt[]{\overline{v^2}}=\sqrt[]{\frac{3RT}{m}}$$

$$\sqrt[]{\overline{v^2}}=\sqrt[]{\frac{3kT}{m}}$$

$$\sqrt[]{\overline{v^2}}=\sqrt[]{\frac{3RT}{M}}$$

$$k=\frac{R}{N}$$

$$k=\frac{R}{N_A}$$

$$D=\frac{m}{V}$$

$$D=mV$$

$$\epsilon=hf=\frac{hc}{\lambda}$$

$$\epsilon=h\lambda=\frac{hc}{f}$$

$$\frac{U_1}{U_2}=\frac{N_1}{N_2}=\frac{I_1}{I_2}$$

$$\frac{U_1}{U_2}=\frac{N_1}{N_2}=\frac{I_2}{I_1}$$

$$\frac{U_2}{U_1}=\frac{N_2}{N_1}=\frac{I_1}{I_2}$$

$$\frac{p}{T}=hằng\ số$$

$$p\sim T$$

$$\frac{p_1}{T_1}=\frac{p_2}{T_2}$$

$$p\sim\frac{1}{T}$$

$$_0^1n$$

$$_1^0n$$

$$_1^1p$$

$$_1^1H$$

$$_0^{-1}e$$

$$_{-1}^0e$$

$$_1^0e$$

$$_0^1e$$

$$_2^4He$$

$$_4^2He$$

$$V_{cầu}=\frac{4}{3}\pi R^3$$

$$V_{trụ}=S.h\$$

$$V_{cầu}=2\pi R$$