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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

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## Hi, I'm Fotios

I am a second year undergraduate student at Imperial College London, studying Materials Science and Engineering. I have experience teaching Maths, Chemistry and Physics to High School students.

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### My education

#### Imperial College London

Materials Science and Engineering - 1st (2017 - now)

#### American Community Schools of Athens

International Baccalaureate - 41 (2015 - 2017)

### My availability

7am - 12pm
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4pm - 10pm
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Maths 💯
180g Of c is mixed with 105g of Z to make an alloy. The density of C is 9g/cm3 . The density of Z is 7g/cm3. What is the density of the alloy?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

From a mathematical viewpoint, you just need to work out the volume occupied by each element by dividing the mass by the density i.e: You have 180/9...Learn more

Science 🔬
How does lightning work?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

What we see as a lightning bolt is the sudden discharge of electrical charge that is accumulated in the clouds and the ground as it rains. As water ...Learn more

Science 🔬
In a star if helium fuses to make carbon, what makes the elements in between?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The fusion of elements in stars depends on the size and temperature of the star itself. Initially the star is mainly formed of hydrogen, which fuses...Learn more

Science 🔬
Why do astronomers try to find the distance to stars using parallax?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

Astronomers use the parallax method because it is one of the most accurate and straightforward ways to measure the distance to stars. Astronomers me...Learn more

Maths 💯
Y''-2y'+y=e^x，y(0)=y'(0)=0. Solve y(2)?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The short answer is 2e^2. However to reach this solution you need to work a bit. This is a second order ordinary differential equation, which means...Learn more

Science 🔬
Can you rank the four forces that affect the structure of an atom in order from the strongest to the weakest?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The four fundamental interactions are the gravitational, electromagnetic, weak and strong nuclear interactions, although there are some newer modifi...Learn more

Maths 💯
Can someone please explain to me how to do these questions ? The coordinates of the maximum point of the graph y = f(x) are (4,3). Give the coordinates of the maximum point of the graph with equation: a) y = f(x), b) y = f(x) - 4, c) y = f(x-2) + 1?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

This is a functions transformation question. What you need to know to solve this is how the addition or subtraction of a number, either within or ou...Learn more

Maths 💯
Consider A(3,60),B(8,150) and O(0,0). Find the area of triangle AOB?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The easiest way to start solving a question like that is to make a plot of the points. It need not be extremely accurate but it will give you an ide...Learn more

Science 🔬
Why does potential energy mean?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

Potential energy is the energy stored in a body due to its position or deformation. It is called “potential” energy simply because it has the potent...Learn more

Science 🔬
Do astronauts age while traveling in space?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

Yes they do. There is a common belief that astronauts do not age in space, or they age much more slowly than people on Earth, and this is true becau...Learn more

Maths 💯
What is the greatest value of 3 cos^2Θ+2?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The maximum value of this expression is obtained when the cos^2 (θ) function takes its maximum value, which is 1. The cos^2 (θ) function is maximum...Learn more

Maths 💯
Ruth’sRags has just increased all of its prices. Last week a shirt cost £40. This week the price of the same shirt is £64. Find the new price as a percentage of the old price. I need help with this question. Thanks?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

To find the new price as a percentage of the old price, you need to divide the new price by the old price, i.e. 64/40. This gives 1.6, which if you ...Learn more

Maths 💯
P is inversely proportional to the square of Q(P,Q > 0). When P=3, Q=4. Find an equation for P in terms of Q and find the exact value of Q when P=8?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

An inverse proportionality means that the two variables are related in a manner like: P=b/Q^2 or P(Q^2)=b where b is a constant of proportionality. ...Learn more

Science 🔬
What is the life cycle of a star?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The life of a star depends heavily on the size (the mass) of the star. All stars are initially formed by clouds of dust, that come together by force...Learn more

Maths 💯
I don’t understand algebra. Help me please. I get stuck and confused at stuff?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

Hello Ambar, Algebra, and maths in general, can be quite challenging but there are tricks to get through the difficulties. What works in every ca...Learn more

Maths 💯
How do you find the area of a triangle with surds as lengths?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

You find the area as usual, by using one of the formulas you already know. The only trick here is to use the lengths in square root format and not a...Learn more

Maths 💯
How do I find n? There is a rectangle and l=125^2n and w=25^n-1 and there area in 625cm^2. I know n=3/4 and I know you have to multiply l and w. What steps are required after that?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

The formula for the area is l•w so your data gives you the exponential equation: 125^(2n) • 25^(n-1) = 625. Notice now that every term in the equa...Learn more

Maths 💯
Express 24 as a product of prime factors?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

24=6*4=2*3*4=2^3 *3

Science 🔬
What is the difference between a type I and type II supernovas?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

What we usually think when we hear the word supernova is a massive explosion of a star that can be seen from a large distance because of its huge sc...Learn more

Maths 💯
What are integrals?
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# Fotios Tsitsos

I love using Mathematics and Science to explain and understand the world.

Integration, or anti-differentiation, is one of the two major operations in calculus, the opposite of differentiation. An integral is the mathematic...Learn more