A helicopter flies off, its propellers rotating. Why doesn't the body of the helicopter rotate in the opposite direction?

1. सामाजिक अधययनमा परयोग हुने सिपहरु उललेख गरनुहोस।
2. कुनै एक सथानीय घटना वा गतिविधिमा आधारित समाचार तयार पारनुहोस ।
3. जीवनोपयोगी सिपअनतरगत निमनानुसारका सीपहरु लेखनुहोस। 

What is the difference between a real and an ideal gas? Explain on the basis of the hypothesis of the kinetic theory.

Answer the following:

 (i) Transition elements form interstitial compounds.

(ii) Mns+(3d4) is strongly oxidising, whereas Cr2+(3d4) is strongly reducing.

(iii) Transition metals have high melting...

Following reactions occur at cathode during the electrolysis of aqueous copper (II) chloride solution:

Cu2+(aq) + 2 e-2 ———–> Cu(s) E = + 0.34 V

H+(aq) + e-1 ————-> 1/2H2(g) E = 0.00 V

On the...