My name is. My surname is. I am. I was born in in. I live in a small town of in the Republic. My address is Flat 116, 19, Street

My name is _____. My surname is ______. I am __________. I was born in ____ in ____________. I live in a small town of ______ in the ______ Republic. My address is Flat 116, 19, _________ Street. My phone number is __________. I am a ____. I go to ____________. I am a good ______. I do well in all subjects. They say that I am a hard-working person. To tell the truth, all school subjects come easy to me but sometimes I have to work long hours, for  example, to do lessons in Physics or Chemistry, to  write a composition or to learn a poem by heart. But my favourite subject is ______. I spend a lot of time on it reading books, doing tests etc. Maybe English and learning it will be a part of  my future career.

I like reading. I think comics and detective stories are much easier to read but I prefer to read novels - historical or  modern. I like music. My musical tastes are different, it depends on my mood. But I think every apple is good in its season. I play the piano and the guitar, not seriously but for my soul. Sometimes I like to listen to Russian classical music.  My favourite composers are Chaikovsky and Mozart. I also like Russian folk songs but I don't like rock music. I don't  have much time to watch TV but sometimes I spend an hour or two watching an interesting film or a news programm. In the evening I often read newspapers (our local ones) or magazines. I like fresh air and exercise. I wish I had more  time for doing sports. But some aerobics in the morning, a swimming pool twice a week, a ski walk on a frosty day are of great help. Sport is fun.

I have a wide circle of interests. I'm very sociable, so I get on very well with people. I have many friends, most of them are my classmates. We spend a lot of time together going out to the cinema or to a disco party, speaking about lessons and music, discussing our problems. But most of all I like my family. We all are great friends and deeply attached to  each other. That's all about me - a person with her good and not very good traits of character, liking this and hating  that. But it's interesting for me to live and to open new things.

Fluid - a substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid.

Fl;uid pressure the pressure exerted by a fluid at any point inside it. The difference of pressure between two levels is determined by the product of the difference of height, the density, and the acceleration of free fall

Density is the measurement of quantity or mass per unit of volume in a particular substance. Density is mathematically defined as mass divided by volume. Density differs from element to element on the periodic table and is also affected by environmental conditions including temperature and atmospheric pressure. Density is also effected by other substances which cause chemical reactions

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north). Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies.

Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed, being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s or m⋅s⁻¹). For example, "5 metres per second" is a scalar, whereas "5 metres per second east" is a vector. If there is a change in speed, direction or both, then the object has a changing velocity and is said to be undergoing an acceleration.