Physics

$\frac{1}{4\pi {\epsilon }_0}\frac{{\left|e\right|}^2}{hc}=\frac{1}{4\pi {\epsilon }_0}\frac{{\left|e\right|}^2}{r^2}*\frac{r^2}{\frac{hc}{\lambda }*\lambda }=\frac{Fr*r}{E*\lambda }$

Dimension of 'Fr' and 'E' are same dimensionless

Fermi level of p-type semiconductors will go downward

Stopping potential defined in terms of wavelength as :

$eV=\frac{hc}{\lambda }-?\Rightarrow 0.710eV=\frac{hc}{491}-?\Rightarrow 1.43eV=\frac{hc}{\lambda }-?$

Using above two equation we can calculate :

$\lambda =382nm$

Using truth table of logic gates

$Y=\overline{\left(A\overline{B}\right)+\left(\overline{A}B\right)}=\overline{\left(\left(A\overline{B}\right)\right)}\overline{\left(\left(\overline{A}B\right)\right)}$

$Y=\left(\overline{A}+\overline{B}\right)\left(\overline{A}+\overline{B}\right)=\left(\overline{A}+B\right)\left(A+\overline{B}\right)=AB+\overline{A}\overline{B}$

Since equation of the gas process is given so we can convert it into T & V form.

$P{V}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}=C$

$\Rightarrow \frac{T}{\sqrt[]{V}}=C$

$\Rightarrow \frac{T_1}{\text{exception 25:}}=\frac{T_2}{}$$\frac{\text{exception 25:}}{}$

$\Rightarrow \frac{T_1}{T_2}=$= $\frac{1}{\sqrt[]{2}}$

As we know that maximum acceleration will act on the particle when it is at extreme position .

$\omega =\frac{\frac{\pi }{6}}{0.1}=\frac{10\pi }{6}$

$f=m{\omega }^{2}x$

$\frac{f}{m}={\omega }^{2}A=\frac{1000{\pi }^2}{36}*0.36={\pi }^2=9.87N$

When two or more individual charges are present in a system, the total charge will be an algebraic sum of all individual charges and not the vector sum. Therefore, an electric charge is considered as a scalar quantity.

This is an interesting question! Even though a proton has a positive charge, the net positive charge in a conducting material is always due to the removal of free electrons. 

This happens due to the availability of only free electrons in all conductors. Since protons are present in the nucleus, they can not roam freely in the conductor, as electrons travel freely in the conductor due to their presence in the outer shell.

A magnetic pole will repel or attract magnetic sheet so force is need.

B. If sheet is non-magnetic, no force needed.

C. If it is conducting, then there will be addy current in sheet, which opposes the motion. So forces is needed move sheet with uniform speed.

D. The non-conducting and non-polar sheet do not interact with magnetic field of magnet.

$f_0=140 cm$ and $f_e=5 cm$

For distant object,

$m=\frac{f_0}{f_e}=\frac{140}{5}=28$