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Calculate the gravitational force acting on the Moon, caused by the Earth, given that the masses of the Earth and the Moon are 6 x10^24 and 7.3 x10^22, respectively. The distance between the Earth and the Moon is 384 400 km.

The relevant equation to use in solving this problem, from Newton's law of gravitation, is Force = ( universal constant of gravitation x mass of earth x mass of moon)/ (distance between earth and moon sq...

Answered by Adam S. • Physics tutor

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Given x^3 + 4x^2 + x - 6 = 0 , and one of the factors of this equation is (x-1), factorise and hence compute the other solutions for the eqaution.

Using either polynomial long division or by inspection, the equation can be reduced to:(x-1)(x²+5x+6)
The other bracket can the be factored out using inspection or the quadratic formula to...

Answered by • Maths tutor

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What is Polymerase Chain Reaction?

Polymerase Chain Reaction (PCR) is a method of DNA amplification. This method utilises complementary primers which target a fragment of interest within DNA. It is made up of cycles of repeated heating and...

Answered by Weronika W. • Biology tutor

1117 Views

When do I use the subjunctive mood in French?

The subjunctive mood is used when expressing needs, desires, preferences, emotions, possibilities, opinions and suppositions. Putting it simply, it is used when something...

Answered by Beth B. • French tutor

1192 Views

How does the process of DNA replication work?

DNA replication is the process by which DNA makes a copy of itself. This happens before cell division so that each daughter cell receives an identical copy of the DNA. In order for DNA replication to occu...

Answered by Clare H. • Biology tutor

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