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Line AB has equation 4x+5y+2=0. If the point P=(p, p+5) lies on AB, find P . The point A has coordinates (1, 2). The point C(5, k) is such that AC is perpendicular to AB. Find the value of k.

i) Well, if point P lies in AB, then the value of its x and y coordinates have to fulfill the condition imposed by equation AB. Therefore, substituting the x value p for x and the y value p+5 for y: 4(p)+5(p...
JL
Answered by Javier L. • Maths tutor
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Explain why the activity of amylase rapidly decreases above pH 7.

pH 7 is the optimum pH for amylase. This means it performs best and has maximum activity at this pH. Above pH 7, the activity of amylase rapidly decreases beacuse the concentration of H+ ions (or protons) is...
ER
Answered by Emilia R. • Biology tutor
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Cosa ti piacerebbe fare la prossima estate?

Mi piacerebbe molto andare in Francia. Non ci sono mai stato, e vorrei vedere in particolare Parigi. Mi hanno detto che i dolci sono buoni.
CM
Answered by Chiara M. • Italian tutor
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Che ruolo ha l'educazione per la crescita personale di una persona?

L'educazione ha un ruolo molto importante, perché aumenta la capacità di pensare e riflettere. Questo è utilissimo per le decisioni fondamentali che la vita presenta. Studiare, inoltre, apre la mente e perme...
CM
Answered by Chiara M. • Italian tutor
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How does an object in circular motion experience acceleration when it is going at a constant speed?

Acceleration is defined as the rate of change of velocity. The important thing to realise here is that velocity is a vector quantity while speed is a scalar one. An object going in circular motion has consta...
LK
Answered by Loukas K. • Physics tutor
5032 Views