Rockets are used to launch artificial satellites.
Write down a class room activity to illustrate this law.

Write down an activity to prove inertia of rest.

Write down the uses of ethanol.

A resistance R is connected to a cell of EMF E and has an internal resistance r as shown in the figure. The voltage across R is measured using and ideal A voltmeter and circuit current is measured by an ammeter. A rheostat of negligible resistance is used to vary the current in the circuit. -Write down the expression for current in the circuit and voltage across R at any instant.

Representatives of some vertebrate classes are introducing themselves. Write down the name of the class in which they belong. a) My gills are covered by operculum. I have bony endoskeleton. b) I give birth to young ones. My body is covered by hair. c) My skin is glandular I Have trilocular heart. d) I live only in marine water. My endoskeleton is made up of cartilage.