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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 square...
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Answered by Adam S. • Physics tutor
32641 Views

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)(x 2 +5x+6) The other bracket can the be factored out using inspection or the quadratic formula to give:(x-1)(x+2)(...
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 co...
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Answered by Weronika W. • Biology tutor
1433 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 is subjective or uncertain .There a...
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Answered by Beth B. • French tutor
1611 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 occur, ...
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Answered by Clare H. • Biology tutor
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