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A large amount of sewage enters a river and many of the fish die. Sewage contains bacteria and organic material. Explain why the fish died.

Bacteria in the water decay organic matter in sewage -> respire aerobically -> uses the O2 in the water and reduces O2 concentration -> fish have less O2 to aerobically respirate -> fish die
CH
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Write a simple Python program that asks a user to input their age and name and then return the text: "Hi my name is *NAME*, and I am *AGE* years old."

Use the follow to create a simple age + name Python program: 1) age = input("Enter age: ") 2) name = input("Enter name: ") 3) print("Hi, my name is " + name + ", and I am &...
CB
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Define ferromagnetism, paramagnetism and diamagnetism, and determine whether the following complexes a) AgCl b) [Fe(CN)6]4- c) [Mn(CN)6]4- d) Co(H2O)6Cl2 are ferromagnetic, diamagnetic or paramagnetic giving a full justification for your reasoning.

Ferromagnetism is the type of magnetism in which the magnetic moments of certain atoms align with the external magnetic field. The examples of ferromagnetic metal are iron, nickel and cobalt.Paramagnetism is...
AB
Answered by Anna B. • Chemistry tutor
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Evaluate the following product of two complex numbers: (3+4i)*(2-5i)

Answer : 26-7iMethod : Expanding the brackets will result in the sum, 6 -15i + 8i - 20i 2 by assessing this you can see that you can evaluate -15i + 8i to be equal to -7i which is the imaginary part of the c...
CB
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Differentate sin(x^2+1) with respect to x

y = sin(x 2 +1) In general, the chain rule is: dy/dx = f(g(x)) = df/dg * dg/dx Applying this to y: dy/dx = d(sin(x 2 +1))/d(x 2 +1) * d(x 2 +1)/dx = cos(x 2 +1) * (2x) = 2xcos(x 2 +1)
Answered by • Maths tutor
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