Lens Basics by Vicente & Lourdes Segura

https://drive.google.com/file/d/0B-1zyIDIorqVdzVQSHFxOWZiQk0/edit?usp=sharing 

Optical Lens

C:\Users\Paula\Desktop\preguntas inglespaulamoyans.pdf

Waves

1. What are waves?

We can define waves as disturbances that transport energy from one location to another one, without any transportation of matter.

2. What are mechanical waves?

Mechanical waves require a material media to propagate from one point to another. For example a sound wave.

3. Why can waves propagate?

Waves can propagate 'cause of the interaction forces between particles of a medium.

4. In the 'spring model', what do the springs represent?

Represents the interaction forces between particles.

5. Can you specify two different types of mechanical waves?

Yes, for example a transverse wave and longitudinal wave.

6. Can you define both kinds of waves?

Transverse wave: make the particles of medium vibrate perpendicular to the direction of wave motion.

Longitudinal wave: make the particles of the medium vibrate parallel to the direction of the wave motion.

7. What is 'inertia'?

It's the tendency of objects to resist change in motion when they're pushed or pulled.

8. What kind of particles tend to have more inertia?

Particles with more a big mass.

9. In longitudinal waves, are the particles of the medium carried along by the propagating waves?

The particles of the medium aren't carried along by the propagating waves.

10. In longitudinal waves, why don't the particles of the medium move at the same time?

Because they have inertia.


PD: My cat's breath smells like cat food 

Maths

 

POSITIVE EXPONENTS

We are going to talk about powers. A power of a number lets you know how many times a number is going to multiplicate.

You can writed it as a small number on the right and above the base number.

For example: 5² = 5 × 5 = 25 (Also known as exponent)

So, 5² will be named as "five to the power two" or "five to the second power" or simply "five squared".

Let's go with another example:

2³ = 2x2x2 =8

So, 2³ could be called "two to the power theree", "two to the third  power" or simply "two cubed"




NEGATIVE EXPONENTS

A negative exponent shows you how to many times you have to divide. 


PD For example: 10 raised to -1 = 1/10= 0,1


PD: Hi Super Nintendo Chalmers

Eugene, Eugene...

 

                                            

Hi dudes! We're going to explain you about Eugene's life.
Eugene is 23 years old, and he was born in a small village in Russia, but he grew up in Brooklyn, New York:

He defines himself like a Hipster, and he likes fashion. Also he likes dancing. His favourite food is sushi.

He had been in a lot of places around the world taking a relaxing Starbucks cup of frapé con leche, in places like Finland, Balthics and Switzerland.

He says that he likes Spain (he knows Madrid Barcelona and Andalucía), spanish people, and spanish cinema too (like films of Pedro Almodóvar).

Eugene is an intelligent boy, he has studied antropology in New York.

Well dudes, this is it, see ya bi****s!

P.D.:  He told me to burn things!

Introducing the Unitards

http://www.youtube.com/watch?v=Sna_K05xSE4




Hi dudes! We are the unitards, the new fan group of Ralph Wiggum.

Our team has four members very specials:

Paula is an ex-student of Arts, and now is studying Audiovisuals with us. She is the most special one member of the group.

The second member is Vicente, he is an athletic boy and he created this blog because he likes computers.

The third member is Manuel, he is the most rapper of the group. He doesn't like sports, he prefers stay at the sofa, drink beer and watch TV.

Finally, the fourth member is Joan. He likes photography and organize parties.

We wish all of you a great year! Thank you for your interest!

PD: Go banana! http://www.youtube.com/watch?v=Sna_K05xSE4