2. Physics is the science of matter and
its motion, space-time and energy.
Physics describes many forms of energy - such as kinetic energy, electrical
energy, and mass; and the way energy can change from one form to
another. Everything surrounding to us is made of matter and Physics
explains matter as combinations of fundamental particles which are
interacting through fundamental forces. It will not be an exaggeration if it is
said that Nature is almost Physics (apart from the fact that the word
Physics itself is derived from Greek "physis" meaning nature).
Physics is all around us. We can find Physics as the backbone for any daily
life example such as an electric light, electricity, the working of our vehicle,
wristwatch, cell phone, CD player, radio, plasma TV set, computer, and -
the list goes on.
4. When we walk or run, our motion
is part of laws of mechanics and
thermodynamics.
5. The refrigerator allows the modern family to keep
food fresh for much longer than before.
The looping wire behind the refrigerator contains
CFC which starts out as a liquid. The pump pushes the
CFC through a lot of coils in the freezer area. There the
chemical turns to a vapor. When it does, it soaks up
some of the heat that may be in the freezer
compartment. As it does this, the coils get colder and
the freezer begins to get colder.
In the regular part of your refrigerator, there are
fewer coils and a larger space. So, less heat is soaked up by
the coils and the CFC vapor.
The pump then sucks the CFC as a vapor and forces it
through thinner pipes which are on the outside of the refrigerator. By
compressing it, the CFC turns back into a liquid and heat is given off and is
absorbed by the air around it. That's why it might be a little warmer behind or
under your refrigerator.
Once the CFC passes through the outside coils, the liquid is ready to go back
through the freezer and refrigerator over and over.
6. These days many of us our suffering eye defects. The major reason
is the change in the focal length of the natural lens of human eye.
Using the optics technology we have invented spectacles which re-
adjust the focal length and we are able to see properly both near
by and distant objects. The knowledge of optics help us in deciding
the correct power and type of lens to be used
7. Reducing Resistance
Frame builders and designers have been working on
creating more aerodynamically efficient designs.
Some recent designs have concentrated on shifting
from round tubes to oval or tear-shaped tubes.
There is a delicate balancing act between
maintaining a good strength-to-weight ratio while
improving aerodynamic efficiency. Improvements to
wheels have made perhaps the biggest impact. A
standard spoked wheel has been described as an
"egg beater," creating many small eddies as the tire
rotates--creating drag. Disc wheels, while generally
heavier than their spoked counterparts, produce less
wind drag and turbulence when they spin.zzz
8. GRAVITY
The obvious answer is that gravity helps to keep everything on the ground &
keeps planets and moon in their orbits
causes tides in the ocean
collects material to form planets and suns
powers the fusion processes in stars
provides potential energy to run turbines at power plants
lets things dall "down"
bends light
provides direction for seeds to grow "up“
helps you balance
lets pendulums keep time ………………………& many more…………………..
9. It works under flurocence principle, it
consist of two filaments at two ends of
the tube and its wall is coated with
phosporous
(a flurocent material) and the tube will be
evacuated with a trace of mercury
vapour(for white colour, carbon di oxide
for green,neon for red colour,etc)when
the supply is on, first the stator with less
air gap get discharged providing high
voltage for instance high enough to ionise
the air inside the tube which makes the
filament to emit electrons which when
stricks the posporous coted on the wall it
starts giving light.
10. The beauty of ceiling fans is that they do
not actually reduce the temperature of the
room, unlike the air conditioner, but due to
the circulation and wind motion they result
in surface cooling and give a breezy feeling.
There was the revolution of electricity which led to automation of a lot
of daily household utilities. Electricity was used to empower the fan
motors and due to the scientific design of fan blades we get the breeze
a man made phenomenon similar to wind creation.
The fan blades create a draught and as you know the warmer air goes
up and when that air is pushed down with a force, we get better air
circulation.
11. Speaker's Vocal Chords
When we speak Audible Sound Waves are produced that propagate toward the phones
microphone.
Microphone / Transducer
The microphone will respond to the sound waves and convert mechanical energy into electrical
energy. This is typically through the reverse mechanics of a speaker. In this case, the cone
shaped "floating" mechanical piece reacts to the sound waves of the person speaking into the
phone. This creates an oscillating motion that moves a electrical coil around a magnetic field.
This produces oscillating electrical voltage/current in proportion to the speed that the
microphone oscillates. At the output of the microphone is a sinusoidal electrical wave form.
Analog to Digital Converter (A-D Converter)
A modem is used to convert analog signals to digital signals.
with Digital you can have Spread Spectrum and increased security.
Receiver
The person being called picks up their receiver when their phone rings and the process reverses
itself.
12. !!!!With rising fuel costs, concerns about global warming
and the growing demand from the developing world, the
burning question is whether the world needs nuclear
power.!!!!
Fissionable material (usually Uranium-235) is used in the core
of the reactor. The material is bombarded with Neutrons so
that the atoms within the Uranium split, releasing alot of
energy (as heat) and also each 'fission' releases either 2 or 3
more Neutrons; this results in a chain reaction i.e. the
process is continuous.
Boron or Graphite rods can be inserted or removed from the
core to control the amount of free Neutrons within the
reactor - this keeps the chain reaction under control.
The heat released is used to heat water which in turn
changes to super heated steam, which is then used to turn
the turbines, which produce electricity.
13. INTERNET in layman language is nothing but a group of
data which are invisible in nature but can be seen on computers.
Well actually it is true…
Internet is a grid of digital and analog signals which are modulated and
Demodulated into each other using a MO-DEM.
Internet come to our home in the form of analog signal which is modulated
to digital signals by the MODEM, so that our computer could understand it.
Internet come under WAVE mechanics because internet is motion of
data in the form of waves…..
14. Using the phenomena known as Peltier's
Effect, it can be inferred that if there be a
junction of two conductors joined together,
then it absorbs heat on passing current
through it. Therefore, it can cool its
surrounding region. Thus, it can be used in
a refrigerator. There is no noise as no
motors are run.
It is also safer as the regular refrigerators
cause damage to the ozone layer by
releasing harmful gases.
