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
2675 Views

Why is GDP not an accurate measure of economic growth?

GDP is a monetary value, it is the "total money value of all final goods and services produced in an economy in one year," therefore it fails to take into consideration any social indicators, where...
MA
Answered by Muna A. • Economics tutor
20371 Views

How should I structure IB Economics Paper 1 style questions?

Part (a) 10 marks, Explain... (15 minutes approx). -Plan your answer (5 mins) Make sure to include: -Definitions of key terms -Graphs -Explanations for graphs and theory/concepts, backed up with examples To ...
MS
13116 Views

Intergrate ln(x) with resepct to x

To integrate this, we use the product rule. Think of it as intergrate [ 1 x ln (x)]. As by the product rule we chose one to intergrate and one to differentiate. We intergrate 1 to get x. We differentiate ln ...
LP
Answered by Leo P. • Maths tutor
4882 Views

When should I use the subjunctive?

Of course, there are thousands of phrases and situations in which the subjunctive becomes necessary in French. Therefore, the best way to remember when to use it is with the mnemonic WEDDINGS: W: Wish / Will...
WD
Answered by Will D. • French tutor
2859 Views