Top answers

In terms of particles, explain how resistance arises in metal conductors and why does this resistance increases with temperature.

Resistance is due to the collision of free electrons with the metal ions of the conductor. When the temperture increases, the metal ions have more energy and vibrate. This increases the frequency of collisio...
RR
Answered by Rhys R. • Physics tutor
14241 Views

The polynomial f(x) is define by f(x) = 3x^3 + 2x^2 - 8x + 4. Evaluate f(2).

f(x) = 3x^3 + 2x^2 - 8x + 4 f(2) = 3(2)^3 + 2(2)^2 - 8(2) + 4 f(2) = 3(8) + 2(4) - 8(2) + 4 f(2) = 24 + 8 - 16 +4 f(2) = 20
SW
Answered by Sophie W. • Maths tutor
4449 Views

What is the difference between vertical and horizontal transmission of antibiotic resistance between bacteria?

Vertical transmission occurs during asexual reproduction. During the cell cycle, a bacterium will replicate its DNA (found in the form of a circular plasmid) which will contain the gene for antibiotic resist...
AA
Answered by Annabelle A. • Biology tutor
17178 Views

What is the difference in meaning between the nominative and the accusative?

The nominative is the case (the form of the noun) used to mark the subject of the verb. That's the person or object (or anything) which is carrying out the action of the verb: the do-er. In the sentence, 'Th...
RG
Answered by Rachel G. • German tutor
4161 Views

If y = 2/3 x^3 + x^2; a) What is dy/dx? b) Where are the turning points? c) What are the nature of the turning points?

a) By simple parametric differentiation of each term, dy/dx = 2x^2 + 2x b) The condition for a turning point is the gradient (dy/dx) at that point is zero. 0 = x(2x + 2) so either x=0 or 2x+2=0. Therefore th...
AF
Answered by Annabel F. • Maths tutor
5029 Views