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The equation x^2 + (k-5)x + 1 = 0 has equal roots. Determine the possible values of k.

So the first part of this question is regarding your knowledge and understanding on the subject matter. You should know that for real and equal roots, (b 2 - 4ac)=0. (For real and unequal roots, it is >0 ...
Answered by • Maths tutor
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A ball of mass m with initial velocity u rebounds from a wall, with final velocity v. Using Newton's laws of motion explain forces acting in the system.

The ball has initial momentum p 1 = mu, and final momentum p 2 =vm. According to the Newton's 2nd law of motion a force exerted on the ball is equal to the rate of change of momentum . It is thus:F = ( p 2 -...
MM
Answered by Maks M. • Physics tutor
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How do you calculate lattice enthaply?

You can't directly measure lattice enthalpy of a solid crystal, so you have to look at a different method. Usually this would be experimentally or using Hess's Law to construct a Born-Haber cycle. The Born-H...
Answered by • Chemistry tutor
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How to use articles in Spanish?

In general, there are two types of articles in Spanish - definite and indefinite.DEFINITE articles are the equivalents of English 'the' and are used to describe a very specific object. These are: EL (singula...
AC
4196 Views

Describe semi-conservative DNA replication

The double helix structure unzips which is catalysed by the DNA Helicase enzyme. DNA Helicase overcomes hydrogen bonding between nitrogenous bases. Two strands are produced, each one acts a template. Free DN...
PA
Answered by Prashant A. • Biology tutor
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