Top answers

What is the difference between the preterite and imperfect past tenses?

The preterite is used to describe actions that were completed at a specific moment in the past. For example, "Ayer, Marina me pidió ir al cine". This action happened yesterday (ayer) and is not a c...
LJ
Answered by Lexi J. • Spanish tutor
2247 Views

How do I differentiate something of the form a^x?

You should write a x as (e lna ) x = e xlna . ln(a) is a constant, so use the chain rule to differentiate this: lna(e xlna ) = lna(a x )
IS
Answered by Ilya S. • Maths tutor
5003 Views

Find the cross product of vectors a and b ( a x b ) where a = 3i + 6j + 4k and b = 6i - 2j + 0k.

a x b = 8i + 24j - 42k
ID
Answered by Isaac D. • Maths tutor
4569 Views

How does a potential divider work?

I've always thought that physics is best explained through analogies, and so instead of two resistors we'll imagine two people (our resistors) in Yo Sushi (where plates of sushi represent our voltage). Say t...
AJ
Answered by Adi J. • Physics tutor
3846 Views

How do you conjugate and apply the future tense in French?

Firstly, we should understand that there are several future tenses in French - just like in English, although you may not have noticed that before. "I will", "I am going to", "I will...
KS
Answered by Katie S. • French tutor
3883 Views