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First simplify the equation of the curve y= x^4 - 3x^3 .The gradient is the differential.To differentiate, bring down the power and take one from it.x^4 becomes 4x^3-3x^3 becomes (-3x3)= -9x^2dy/dx= 4x^3 ...

One reason can be a that the country is land-locked. This means that the land area has to rely on water from rivers; they are not able to resort to desalination to obtain freshwater. Moreover, the country...

Crude oil is a mixture of several different organic (carbon containing) molecules with different chain length. The different chain lengths mean that theses molecules have different boiling points; the lon...

1/20 + 1/20 = 1/R2/20 = 1/R1/10 = 1/RR = 10
Now, answer for a 20 Ohm and a 10 Ohm resister in parallel?1/20 + 1/10 = 1/R3/20 = 1/RR = 6.67 Ohm

Natural selection is all about the 'survival of the fittest' - the organisms which are best suited to their environment are most likely to survive and have offspring, leading to a change in allele frequen...