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Define the term 'Bronsted-Lowry acid'

A proton ( H+ ion) donor
Answered by • Chemistry tutor
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What is Darwin’s theory of Evolution by Natural Selection? What is the evidence?

It describes the differential survival and reproduction of different organisms with varying phenotypes. These differences are at least partially heritable, thus over time, gradual changes accumulate in a lin...
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Answered by Nicole S. • Biology tutor
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Define the moment of a couple

The moment of a couple is the force times the perpendicular distance between the lines of action of the force.
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Answered by Heather W. • Physics tutor
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An object with weight w is suspended from two strings at angles θ1 and θ2 to the vertical and with tensions T1 and T2. How would you resolve the vertical and horizontal forces?

Horizontal: T1 sin θ1 = T2 sin θ2Vertical: T1 cos θ1 + T2 cos θ2 = w
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Answered by Heather W. • Physics tutor
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How and when do I use the imperfect subjunctive?

The imperfect subjunctive is formed by taking the root of the first person preterite (e.g. the verb 'comer' - 'to eat' - becomes 'comi') and adding the following endings: -iera (e.g. comiera)-ieras -iera-iér...
Answered by • Spanish tutor
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