Top answers

All subjects
IB

What is the difference between internal and external validity?

Internal and external validity both relate to the evaluation of a research's study / procedure' validity.
Internal validity refers to whether there is a causal relationship between the independent va...

KK
4697 Views

What is the simples way to integrate by part?

In a case of integral that you want to integrate once using technique "by parts" you have to divide your integral into two functions.Working on an example, f(x)=x sinxLet g(x)=x and h'(x)= sin x...

MK
Answered by Michał K. Maths tutor
1410 Views

Why cant I use the same expression for doppler effect when the source is in motion and when the listener is in motion?

This is a common misconception that involves changes in frames of reference. In most contexts moving towards an object refers to the same physical reality as the object moving towards you (at constant spe...

FM
Answered by Francisco M. Physics tutor
1351 Views

Is there a Case Study I could use for multiple topics?

Yes, there are some case studies which I like to call 'Gold Star Case Study', which can be used as examples for perhaps Paper 1 (Gender) or maybe Paper 3 for TNCs. Such as the tulip company OVERRAN in Lak...

CC
1534 Views

When do I use Pretérito imperfecto and when do I use Pretérito indefinido?

Pretérito imperfecto is a past tense that is used for routines, recurring activities, descriptions of situations and ongoing activities that were suddenly interrupted. For example: Cuando era niña, siempr...

MS
Answered by Milena S. Spanish tutor
1875 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning