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Why does the Hjulstrom curve have its shape

As grains get larger, they require more energy from the transport medium to erode away.Larger grains are deposited at higher energies than smaller grains because they require an even greater amount of energy...
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Answered by Felix B. • Geology tutor
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How can you deduce the order of the reaction with respect to the reagent based on the graph of its concentration against time?

For the zeroth order reaction, the graph would be a straight line with a negative gradient. For the first order reaction, the graph would be a curve with constant half-life. That means the time for the conce...
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Answered by Joanna U. • Chemistry tutor
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What is the equation of the tangent at the point (2,1) of the curve with equation x^2 + 3x + 4.

dy/dx = 2x + 3, m = dy/dx = 7 Equation of tangent is a straight line hence we use y-y1 = m(x-x1), y-1 = 7(x - 2), y = 7x - 13
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Answered by Bishr A. • Maths tutor
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Translate the text in French: Last Monday I went to the ice cream shop with my best friend Marie. It was a very fun day in my opinion. Sadly, the next morning I woke up with a sore throat and I had to visit the doctor. My mom came with me.

Lundi dernier, je suis allée au glacier avec ma meilleure amie Marie. C'était une journée très amusante à mon avis. Malheureusement, le lendemain matin, je me suis reveillée avec un mal de gorge et j'ai dû a...
Answered by • French tutor
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Describe and explain how the secretion of ADH affects urine produced by the kidneys.

ADH diffuses into the bloodstream and acts in the kidney to regulate the volume and concentration of the urine . The ADH binds onto the receptors on the collecting duct controlling the permeability of the co...
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Answered by Adithi M. • Biology tutor
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