Question

15 points question Q-3

Answer 1

Answer:

Opposite charges attract each other (negative to positive). Like charges repel each other (positive to positive or negative to negative). ... The rubbing of certain materials against one another can transfer negative charges, or electrons. For example, if you rub your shoe on the carpet, your body collects extra electrons.

Answer 2

Answer:

\documentclass[10pt,a4paper]{article}

\usepackage[utf8]{inputenc}

\usepackage[T1]{fontenc}

\usepackage{amsmath}

\usepackage{amsfonts}

\usepackage{amssymb}

\begin{equation*}

\begin{flushleft}

N_{i}=\sum_{i\ne j} r_{i} \times F_{i}^{j}=\sum_{i\ne j} r_{j} \times F_{i}^{j}

\end{flushleft}\begin{flushright}

used dummy variable concept

\end{flushright}

\end{equation*}

\end{document}\documentclass[10pt,a4paper]{article}

\usepackage[utf8]{inputenc}

\usepackage[T1]{fontenc}

\usepackage{amsmath}

\usepackage{amsfonts}

\usepackage{amssymb}

\begin{equation*}

\begin{flushleft}

N_{i}=\sum_{i\ne j} r_{i} \times F_{i}^{j}=\sum_{i\ne j} r_{j} \times F_{i}^{j}

\end{flushleft}\begin{flushright}

used dummy variable concept

\end{flushright}

\end{equation*}

\end{document}

< marquee behavior = left > Text<marqueebehavior=left>Text

< marquee behavior = left > Text<marqueebehavior=left>Text

< marquee behavior = left > Text<marqueebehavior=left>Text

< marquee behavior = left > Text<marqueebehavior=left>Text

< marquee behavior = left > Text<marqueebehavior=left>Text<b><i><marquee>{your text}

< marquee behavior = left > Text<marqueebehavior=left>Text

< marquee behavior = left > Text<marqueebehavior=left>Text