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What are the differences between the imperfect and preterite tense?

They are used to describe two different types time in the past. The imperfect is used largely to describe an ucompleted action (Estaba en el telefono cundo mi madre gritó) or an interruped action, a repeated...
ET
Answered by Elisabeth T. • Spanish tutor
2575 Views

Use the geometric series formula to find the 9th term in this progression : 12 18 27...

Formula for nth term in a geometric progression = ar^n-1 workings: a=12 r=1.5 because 18/12 = 1.5 Thus, using ar^n-1 --> 12 * 1.5^8 = 307.54... or 308 (to 3sf) (In an ideal scenario question we'd be worki...
PF
Answered by Philip F. • Maths tutor
9068 Views

A tank contains 45 000 cm3 of water. The tank leaks at 0.75 litres/minute. How long does the tank take to empty?

The first thing to notice with this question is that the volume of the tank is given in cm 3 yet the rate at which the water leaks is in litres, so a conversion of units will be neccessary. We know that ther...
TG
Answered by Tom G. • Maths tutor
11961 Views

Describe the roles of calcium ions and ATP in the contraction of a myofibril (5 marks)

Calcium ions, which diffuse in from the sarcoplasmic reticulum, cause tropomyosin to shift which reveals the myosin binding site located on the actin filament allowing the myosin head to bind. A molecule of ...
MY
Answered by Molly Y. • Biology tutor
13080 Views

What should I emphasise in my personal statement.

Subjects Your CV covers your subjects, but your PS allows you the opportunity to show that you undertsand the implications of what you are learning, how they apply to what you want to study at university and...
JC
3076 Views