Top answers


In a doppler shift why does a moving source show no increase in speed of the mechanical waves emitted?

I'll first ask the student to explain the difference between a moving source and moving observer, prompting them until they get something like this(asking them to draw a diagram if needed)- When the observer...
JG
Answered by James G. • Physics tutor
2624 Views

How does idaafa work with more than two nouns?

If we want to have a idaafa like "the woman's husband's book" (=the book of the husband of the woman): Well, we can form as long as string of nouns as we like, all in the 'of' order, with only the ...
EL
Answered by Emily L. • Arabic tutor
2451 Views

How does idaafa work?

The Idaafa construction is how we do possession in Arabic. In English, we can express possession in two different ways: "the woman's book" or "the book of the woman". Arabic has a structu...
EL
Answered by Emily L. • Arabic tutor
5884 Views

How do I multiply indices together?

Multiplying indices is much easier then it first seems. First you need to undertand what an index or power is, A^2 (A to the power of 2) means AxA, A^3 (A to the power of 3) means AxAxA and so on. The diffic...
FC
Answered by Freya C. • Maths tutor
15221 Views

Why are case studies important? and how do I remember them?

Case studies are important because they demonstrate your knowledge in the context of the real world. Using case studies is about backing up your argument with examples, to show that you know what your talkin...
FC
Answered by Freya C. • Geography tutor
14110 Views