रासायनिक अभिक्रियाएं एवं समीकरण - L24 | NCERT Discussion Part 2 | CLASS10 विज्ञान | 8AM Nishtha mam

Class 10 Science (Hindi) | Chapter 1 | रासायनिक अभिक्रियाएँ एवं समीकरण | Important Questions | Quick Revision

A block A of mass 2 kg is placed over another block B of mass 8 kg and supported by a ledge L fixed on block B on its smooth surface as its extended part. If a force F=100 N is applied on block B , it starts moving on rough horizontal surface. Find the force exerted by block B on is 25 N . (Take g=10m//s^(2) )

The flow of blood in a large artery of an anaeshetized dog is diverted throg]ugh a venturimeter. The wider part of the meter has a cross sectional area equal to that of the artery i.e. 8 mm^(2) . The narrower parts has an are 4 mm^(2) . The pressure dorp in the artery is 24Pa . what is the speed of the blood in the artery ? Given that density of the blood = 1.06 xx 10^(3) kg//m^(3)

The product of the L.C.M. and H.C.F. of two numbers is 24. The difference of two numbers is 2. Find the numbers. (a) 2 and 4 (b) 6 and 4 (c) 8 and 6 (d) 8 and 10

An iron atom has a dipole moment of 9xx10^(24)Am^2 . Density of iron is 8g//cm^3 and molecular mass is 55g mole^-1 . If domain size of iron is a cube of side 10^-6m find (i) number of atoms in the domain (ii) maximum dipole moment (iii) intensity of magnetisation.

(a) A wire of resistance R, length l and area of cross-section A is cut into parts, having their lengths in the ratio 1:2. The shorter wire is now stretched till its length becomes equal to that of the longer wire. If they are now connected in parallel, find the net resistance of the combination. (b) Write the name of the materials having resistivity of the order of (i) 1.7 xx 10^(-8) Omega m and (ii) 10^(15) Omega m at 0 ""^(@)C .