Top answers

Explain how a standing wave is formed

A standing wave is formed when two waves travelling in oposite directions interfere with each other. The waves will be exactly one half wavelength out of phase, and this phase difference allows them to infer...
FP
Answered by Fraser P. • Physics tutor
3966 Views

I find conversations and pronunciation specially difficult. How can I get better?

Listening to your own voice in a different language takes time to get used to. As with most skills, the more you practice, the better you get at it. Reading Spanish out loud will help you get more familiar w...
ZR
Answered by Zenely R. • Spanish tutor
2232 Views

Factorise and simplify the following equation: (2x^2 + 5x + 3) / (x + 1)

Firstly, you must factorise the quadratic equation on the numerator of the fraction. Observe that the x^2 has a coefficient of 2 and the term with no x terms is 3. 3 can only be factorised by 1 and 3. Also, ...
MC
Answered by Molly C. • Maths tutor
6683 Views

The time taken for a wave to pass a point is 2.5 seconds. What is the frequency of the wave?

For this, we need to use the equation F = 1/T (where F = frequncy, and T = period). The period of this wave is the time taken for one whole wave to pass i.e. from one wave crest to the next wave crest. Here ...
FP
Answered by Fraser P. • Physics tutor
6549 Views

Expand and simplify (2x+5)(x^2 + 3x -1)

The answer should be 2x 3 + 11x 2 +13x - 5 Remeber to multipy both brackets together, and collect like terms. (Watch out for the minus sign)
FP
Answered by Fraser P. • Maths tutor
5026 Views