Do you remember the ohm´s law?

After watching the above video , answer the following questions:

1. - Which are the two types of current? What are the differences between them?

2. - Which units do we use to measure: Voltage (V o E), Current (I) and Resistance?

3. - How can we determine the value of R, V (E) o R? Try to explain with your own words how you´d calculate each value.

4. - How (with which unit) do we measure power?

5. - What does the term watts refers to?

2 Wich are the main differences between the two types of bitmap format you have mentioned in the question above.

The main differences are that the bmp spend more memory and has higher resolution than the jpg the jpg spend less memory and has less resolution.

4.-Explain what is meant by the term vector format.

A vector format is using mathematical equations of geometrical primitives such as points,lines,curves, and shapes, or poligon's to represent images in computer graphics.

Activity 1 .

1.-Explain what is meant by the term bitmap format.And give two examples of bitmap format file types.

Bitmap is a type of graphic composed of pixels in a grid.Each pixel or "bit" contains color information for the image.Some common bitmap formats are GIF and JPG.

3.- Name some disadvantages of using bitmap format graphics.

Bitmaps have two disadvantages. In terms of the amount of digital storage, bitmaps are memory intensive, and the higher the resolution, the larger the file size. The other disadvantage with bitmaps is when an image is enlarged, the individual coloured squares become visible and the illusion of a smooth image is lost to the viewer. This 'pixelation' makes the image look coarse.

5 .- Give some advantages and disadvantages of using vector format graphics.

Advantage:

-Each vector objet is scalable and can generally be resized without any loss of memory.

Disadvantage:

-Vector images though they are highly defined, are not appropiate for use in producing realistic-looking photos and images. Vector images have solid color and they are not conducive to sequences of subtle color tone and shade.

ENGLISH AND COMPUTER

Unit 1 - COMPUTERS AND THE PASSIVE VOICE

- When the computer is switched off, the contents of ROM are not lost.
- The main use of ROM memory in a computer is to store a program that runs when the computer is turned on.
- The contents of RAM can be changed because it only stores programs temporarily.
- Binary numbers are used by computers because they are very simple to make electronic circuits for.
- A binary number is represented by a pattern of 0 and 1.
- A single unit in binary is called a bit.
- Computer memory is measured is bytes.
- One byte is needed for each letter.