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R-39 (Kod NATO: SS-N-20 Sturgeon) – radziecki trzystopniowy pocisk balistyczny SLBM, na paliwo stałe. R-39 przenosił 10 głowic MIRV o mocy 100 Kt na odległość 8300 km. [2] R-39 przenoszone były przez okręty podwodne projektu 619 (testy) oraz 941 .
The Three Rs: past, present and future - Volume 14 Issue 4 Our systems are now restored following recent technical disruption, and we’re working hard to catch up on publishing. We apologise for the inconvenience caused.
R-39. Russian submarine-launched ballistic missile. First Russian solid-propellant submarine-launched ballistic missile. Deployed on six Typhoon subs, 1984-2004. Proposed as the basis for numerous satellite launchers. AKA: 3M65;D-19 Grom;Rif-M;RSM-52;SS-N-20;Sturgeon. Status: Retired. Payload: 2,550 kg (5,620 lb).
:1 II :J n !I il 'I Ii f) Ii II II Chapter 2 The Three Dimensional Solubility Parameter 2.1 Introduction The original purpose of the work reported in this section was to better define the meaning of the terms hydrogen bonding, polar bonding, and polarity. Polymer solubility was studied to attempt this because it was polymer-solvent interactions
Reading text. The three Rs: Reduce! Reuse! Recycle! There are lots of ways we can look after our planet. Three great ways are 'the three Rs': R educe! R euse! R ecycle! We throw away too many things and make too much rubbish. Lots of the things we throw in the bin take thousands of years to go away.
Alternatives. The Three Rs. William Russell and Rex Burch developed the concept of the 3Rs during the 1950s, and described them in their book The Principles of Humane Experimental Technique, published in 1959: Replacement. Reduction. Refinement.
Solution. The correct option is A 2. 39C3r−1−39Cr2 = 39Cr2−1−39C3r. ⇒ 39C3r−1+39C3r = 39Cr2−1+39Cr2. (∵ nCr +nCr−1 = n+1Cr) ∴ 40C3r = 40Cr2. ⇒ r2 = 3r or r2+3r−40= 0. ⇒ r(r−3) =0, or (r+8)(r−5) = 0. ∴ r =0,3 or r =5,−8. but 0 and −8 is not acceptable. ⇒ r =3,5 are only possible values. Hence, the number of values of ' r ' is 2. Suggest Corrections.
