Top answers

Explain what is meant by a critical path.

The critical path is the path from the start to the end event continuously, with the end of one activity forming the start of the next. There is zero float and the project will be completed in the minimum time.
GC
Answered by George C. • Maths tutor
3913 Views

Explain, in terms of atomic energy levels, how an atomic emission spectrum is formed

Absorbed energy results in electron excitation. De-excitation then occurs, whereby electrons fall back down to the ground state. Energy levels are quantised, therefore each line represents a specific frequen...
GC
Answered by George C. • Chemistry tutor
2777 Views

Can you explain the photoelectric effect?

The photoelectric effect is one of the first pieces of experimental evidence of quantum mechanical phenomena. It describes how a material absorbs light and result in emission of electrons. Using a classical ...
AH
Answered by Anthony H. • Physics tutor
2412 Views

Can you give an example of using the chain rule for differentiation? Example: Let y=(6 + 2x + 2x^2)^3, find dy/dx.

The chain rule is given by dy/dx= (dy/du)(du/dx). If we set u=6+2x+2x 2 then, y=u 3 thus, dy/dx=(3u 2 )(2+4x) = (3(6+2x+2x 2 ) 2 )(2+4x). Example does not ask to simplify expression or evaluate at any partic...
AH
Answered by Anthony H. • Maths tutor
3896 Views

Explain what Fartlek Training is and give an advantage and disadvantage of this type of training.

Fartlek Training is a type of continuous training that involves varying speeds, inclines and terrains meaning intensity changes throughout the workout. It is used mainly by games players e.g. HockeyAn advant...
JB
7272 Views