Sunday, 9 May 2021

OXYGEN CONCENTRATOR



OXYGEN CONCENTRTOR is a device which separate oxygen from air. Air has around 71% nitrogen and then other gases.Oxygen is around 27 to 28 % in the air. This concentrator separate oxygen from air and this oxygen can be medically used for patients.

Pair of linear equation s class 10 imp

  Question 1. Draw the graph of 2x + y = 6 and 2x – y + 2 = 0. Shade the region bounded by these lines and x-axis. Find the area of the shad...