2. 1) Title Page
2) Table Of Contents
3) Astronaut
4) Baking
5) Chamical Change
6) Density
7) Electrical-Thermal
8) Force=Mass x Accelaration
9) Gas
10) Hypothesis
11) Idea Models
12) Jewlry
13) Kelvin
14) Kelvin
15) Lever
16) Mass
17) Noroseareon
18) Percision
19) Quarks
20) Radiation
21) Series
22) Electrical thermal
23) Unbalanced
24) Velocity
25) Weight
26) X-Ray
27) Yettebrom
28) Zewaii ,ahmed h
Table Of Contents .
3. Astronaut
An astronaut or cosmonaut is
a person trained by a human
spaceflight program to
command, pilot, or serve as a
crew member of a spacecraft.
While generally reserved for
professional space travelers,
the terms are sometimes
applied to anyone who travels
into space, including scientists,
politicians, journalists, and
tourists.
Until 2002, astronauts were
sponsored and trained
exclusively by governments,
either by the military, or by
civilian space agencies. With
the sub-orbital flight of the
privately funded Spaceshipone
in 2004, a new category of
astronaut was created: the
Commercial Astronaut
4. Baking
The act or process of
cooking in an oven, or
of drying and
hardening by heat or
cold.
2. The quantity baked
at once; a batch; as, a
baking of bread
5. Chemical Change
When something
undergoes a "chemical
reaction" and a new
substance is formed as a
result, we call this chemical
change. In some instances,
simply applying heat can
cause a chemical change.
Cooking pancakes, for
instance, is an example of a
chemical change; the
pancake batter "changes"
from a liquid to a solid.
Rust forming on metal is
another example of a
chemical change. The iron
reacts with water and
oxygen to create a new
substance — rust.
6. Density
A measure of the quantity
of some physical property
(usually mass) per unit
length, area, or volume
(usually volume).
♦ Mass density is a
measure of the mass of a
substance per unit volume.
Most substances (especially
gases such as air) increase
in density as their pressure
is increases or as their
temperature decreases.
♦ energy density is a
measure of the amount of
energy (often in the form of
electromagnetic radiation)
per unit volume in a region
of space or some material
7. Electrical - Thermal
Supercritical water: 375 –
700 °C (typically modern
coal fired power plants)
• Moderate temperature
steam: 150 – 350 °C
(nuclear plants, various
fossil fuel power plants)
• Hot and pressurized
water : 70 – 120 °C (hot
water from waste burning,
industrial waste heat etc)
• Cold reservoir: -70 to -10
°C (coolant in the heat
exchange piping)
8. Force = Mass x
Accelaration
Force = Mass X
Acceleration in a linear
system. The units of
force are kilogram
meter per second
squared or newtons
9. Gas
An airlike fluid substance which expands freely to fill
any space available, irrespective of its quantity.
Verb
Attack with or expose to poisonous gas.
Synonyms
gasoline - petrol - benzine
10. Hypothesis
A hypothesis (plural hypotheses) is a
proposed explanation for a phenomenon
For a hypothesis to be a scientific
hypothesis, the scientific method
requires that one can test it. Scientists
generally base scientific hypotheses on
previous observations that cannot
satisfactorily be explained with the
available scientific theories. Even though
the words "hypothesis" and "theory are
often used synonymously, a scientific
hypothesis is not the same as a scientific
theory A scientific hypothesis is a proposed
explanation of a phenomenon which still
has to be rigorously tested. In contrast, a
scientific theory has undergone extensive
testing and is generally accepted to be the
accurate explanation behind an
observation. A working hypothesis is a
provisionally accepted hypothesis
proposed for further research
11. Idea Models
Is a/an mental picture
of something that is
hard to understand. It
helps you understand it
by picturing it in your
mind.
12. Jewlry
Personal ornaments, such as necklaces, rings, or
bracelets, that are typically made from or contain jewels
and precious metal.
13. Kelvin
The SI base unit of
thermodynamic
temperature, equal in
magnitude to the
degree Celsius.
14. Lever
A rigid bar resting on a
pivot, used to help
move a heavy or firmly
fixed load with one end
when pressure is
applied to the other.
15. Mass
A coherent, typically large body of matter with no
definite shape.
Adjective
Relating to, done by, or affecting large numbers of
people or things.
Verb
Assemble or cause to assemble into a mass or as one
body: "both countries began massing troops in the
region".
17. Oh’s Law
For many conductors of electricity, the
electric current which will flow
through them is directly proportional
to the voltage applied to them. When
a microscopic view of Ohm's law is
taken, it is found to depend upon the
fact that the drift velocity of charges
through the material is proportional
to the electric field in the conductor.
The ratio of voltage to current is
called the resistance, and if the ratio is
constant over a wide range of
voltages, the material is said to be an
"ohmic" material. If the material can
be characterized by such a resistance,
then the current can be predicted
from the relationship:
18. Precision
1. The quality,
condition, or fact of
being exact and
accurate.
2. Marked by or
adapted for accuracy
and exactness: "a
precision
instrument".
19. Quark’s
Any of a number of
subatomic particles
carrying a fractional
electric charge,
postulated as building
blocks of the hadrons
20. Radiation
1.The emission of energy
as electromagnetic waves
or as moving subatomic
particles.
2.The energy transmitted
in this way.
21. Series
1.A number of things, events,
or people of a similar kind or
related nature coming one
after another: "a series of
lectures".
2.A set of related television or
radio programs, esp. of a
specified kind: "a new drama
series".
22. Electrical Thermal
thermal means
coal.with coal it
produces electricity.
this electricity is
thermal electricity.
23. Unbalanced
1.Not keeping or showing
an even balance; not
evenly distributed.
2.(of a person)
Emotionally or mentally
disturbed.
25. Weight
A body's relative mass or the
quantity of matter contained by it,
giving rise to a downward force;
the heaviness of a person or thing.
Hold (something) down by placing a
heavy object on top of it: "a mug
weighted down a stack of papers".
27. Yetterbum
Comprehensive data on the
chemical element Ytterbium is
provided on this page;
including scores of properties,
element names in many
languages, most known
nuclides of Ytterbium.
Common chemical compounds
are also provided for many
elements. In addition technical
terms are linked to their
definitions and the menu
contains links to related
articles that are a great aid in
one's studies
28. Zewaii ,Ahmed ,h
Chemist Ahmed H. Zewail was
born February 26, 1946,
Damanhur, Egypt. In 1999 he
won the Nobel Prize for
Chemistry for developing a
rapid laser technique that
enabled scientists to study the
action of atoms during
chemical reactions and gain
more control over the
outcome. The breakthrough
created a new field of physical
chemistry known as
femtochemistry.
