# Joseph John Fernandez

I love maths and physics, but I love helping people understand them even more!

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Maths

Asked by Omar · 3 years ago

What is the easily to learn simultaneous equation in math?

Practice! There are three main different methods you would learn at high school level, but the key is lots of practice (as with all of school maths).

Maths

Asked by Somersby · 3 years ago

How do you find how many black balls there are using the experimental probability and the total number of balsl?

The only way to know the total number of balls is to have them counted or have that information given to you. Lets call this number N. You can find the experimental probability of finding a black ball by, say, pulling balls out of a bag which contains them all. You count how many balls you take in total (lets call this number S, the sample size) and also how many are black balls we get (call that... more

Maths

Asked by Kochava · 3 years ago

What is the LCD of 5/22-1/33?

If by LCD you mean the lowest common denominator of 5/22 and 1/33, it is 66. 22 and 33 share the fact that they are multiples of 11, 22=2x11, 33=3x11. The LCD is 2x3x11.

Physics

Asked by Samm · 3 years ago

What is the relationship between physics and technology?

Briefly Technology is primarily based on Engineering which has its basis on Physics and Maths. So physics is the basic science of understanding natural phenomena and technology is the application of such ideas to solve everyday problems.

Maths

Asked by Ella · 3 years ago

How do you solve simultaneous equations?

There are three methods: by substitution, by elimination or graphically. The first two are different ways to do the same thing: eliminate one of the variables and end up with a single equation with one unknown. Then you can solve this equation and substitute the result in any of the two original ones to fine the second unknown. The third method consists of drawing the line represented by each eq... more

Maths

Asked by Amy · 2 years ago

Is the largest angle in a triangle a right angle? Explain your answer?

The largest angle in a generic triangle does not need to be a right angle. (eg for an equilateral triangle all angles are 180/3 = 60) However as above, IF a right angle is one of the angles in a given triangle then it must be the largest angle (as the sum of the 2 remaining angles must be equal to 90, and each angle must be greater than [and not equal to] 0). Also, it is obviously possible to ha... more

Maths

Asked by Amy · 2 years ago

Laura thinks that a triangle cannot have two obtuse angles.Do you agree? Explain your answer?

An obtuse angle is an angle greater than 90° and the sum of angles in a triangle is 180°. If we had two obtuse angles then this would mean that the sum of the angles of the triangle would be greater than 180°, as both of the angles would be greater than 90° and we would still have a third angle to account for. So we can't have more than 1 obtuse angle.

Geography

Asked by Chloe · 3 years ago

What is the population of Lagos, Nigeria?

Google is your friend for this kind of question, and faster than using an app I might add!

Chemistry

Asked by Alex · 3 years ago

Why is the sky blue?

The sun emits light and this travels to our earth in a straight line. The light contains the entire spectrum of colours and each colour has a wavelength. When the light reaches earth, the shortest wavelength blue gets reflected off of gas molecules like oxygen in our sky. We see this blue when the blue light that the molecules reflected get scattered in different directions. The longer wavelengths... more

Biology