Solar Wind And Solar Activity

It can be glean in the picture that there are holes which are associated with open field lines that allow for a continuous outflow of solar wind particles. These holes are called coronal holes. Coronal Holes are solar features that appears as large dark holes when the usn is viewed in x-ray wavelengths.

DLSU Basketball

Physics in Basketball

It is my great honor to present my very energetic and studious student in De La Salle University Dasmariñas Cavite Philippines.

As a Physics teacher of very energetic class.I have to think of an activity which will suit to their level of eagerness and ofcourse I want my students should enjoy. My laboratory partner and I have decided a shooting activity. We call this activity as Physics in Basketball. The only material that used in this activity are basket tennis ball, timer, and meter stick. The students just stand on a free throw line and shoot the basket if the shooting was successful. The students will just stop moving and then their tip finger up to the floor will be then measured. The most exciting part of this is the shooting and the pausing of the shooter. The height of the ring (basket) and distance of the free throw line was also emasured by the students.

At this juncture students enjoyed the activity of projectile. With this simple activity student realized the relevance of projectile in their everyday life.

Note: Students enjoyed Physics and shows the love of their work in these pictures.

THE TICKER TAPE TIMER

The ticker tape timer

At a glance this apparatus have no any arrived in freshmen students especially if students have no experience in a physics laboratory. This very simple rectangular black apparatus with switch was used to detemine the acceleration of an object moving down an incline plane or dynamic track.

It is sometimes called recording timer. It leads in the realization of the distance covered by an object under accelerated motion increases for same time interval.

This device is operated on a low voltage AC supply of usually 60 HZ. However the experiment done in the Laboratory has only 10 HZ and 40 Hz. This device also serves as vibrator which leaves dots on a paper tape using a carbon paper.

Wave Motion

Wave refers to any disturbance from an equilibrium position which travels or propagates itself over time from one place to another. Waves have two types these are longitudinal waves and transverse waves. Longitudinal waves occurs when the particles vibrates parallel to the direction of the motion of the waves while Transverse waves travels at right angles to the motion of the particles. Examples of transverse waves are Heat and Light waves. Longitudinal example is Sound.

Parts of waves are crest, trough, wavelength and amplitude. Wavelength refers to the distance between two parallel parts in two following waves. Amplitude is the height of the wave measured from equilibrium position. Crest is the height of the wave or the point where the wave exhibits the maximum amount of positive or upwards displacement and lastly trough is the lower height of the wave or the points where the wave exhibits its maximum negative or downward displacement.

Atwood machine

Newton’s second law of motion: Atwood machine

Most of the students were not that familiar with Atwood machine when entering in a Physics laboratory because it is not that attractive but when the professor, introduce the apparatus, students appreciate the importance of it in learning Physics.

Atwood machine was used to demonstrate the principle of Newton’s Second law of motion which is commonly known as Law of acceleration.

The formula used in this experiment was from the kinematics equation which is d = Vi t + ½ at^2. Of course the experiment starts from rest so the formula then was simplified to d = ½ at^2 . From this equation the formula of acceleration was then derived.

a= 2d

t^2 This serves as experimental value of acceleration.

On the other hand the formula for theoretical value of acceleration was derived from Force = weight which means a (m1 + m2) = (m2-m1) g. From here the formula of acceleration was derived

a= (m 2-m1) g

(m 1 + m2)

.

All about Physics

It is a common knowledge that Physics is a branch of Physical Science which deals with the study of matter, energy and their interactions. It is one of the foundations of all sciences. It is classified as an Experimental Science. It is also categories as the basic of all sciences. It primarily involves Units, Physical Quantities and Vectors, Motion along Straight and Curved Path, Work, Energy, Power, Momentum and its relationship to Impulse and etc.

Physics and Measurement with conversion table

Chapter I

Introduction:

What is Physics?

Physics is a branch of Physical Science which deals with the study of matter, energy and their interactions.
Physics is one of the foundations of all sciences. It is classified as an Experimental Science. It is also categories as the basic of all sciences. It primarily involves Units, Physical Quantities and Vectors, Motion along Straight and Curved Path, Work, Energy, Power, Momentum and its relationship to Impulse and etc.

What are the Subdivisions of Physics?

The subdivisions of Physics are Mechanics, Heat, Light, Sound, Electricity and Nuclear Physics.

Mechanics. The branch of Physics which deals with energy and forces and their effect on
bodies.

Heat. It concerned primarily with the condition of the body at a certain high temperature
or a change in temperature.

Light. The study of electromagnetic radiation and the emission of photons from the
excited state.

Sound. It refers to the transmission of longitudinal pressure waves(sound wave)(as in air)
that is the stimulus to hearing

Electricity. The study of the movement and interaction of electrons.

Nuclear Physics. This is also called Atomic Physics. It refers to the study of the behavior of the atomic nucleus or energy derived from it.

MEASUREMENT

What is measurement?
Measurement refers to the comparison of an unknown quantity with a standard.
= it judge against a quantity with a standard to see
how many times as big as the standard the quantity is.

Background of Measurement

Unit of the quantity = standard for describing magnitudes of physical quantities.

1791 =metric system of measurement was established, Paris Academy of Sciences

o Meter was originally define as one ten-millionth of the distance from the equator to the North pole

o Second as the time for a pendulum one meter long to swing from one side to the other.

1889 the definitions of the basic units have been established by an international organization, the general Conference on weights and Measures.

1960 it has been known officially as the International System or SI (the abbriviation for the French equivalent, Syteme International)

o meter was define by an atomic standard, in terms of the wavelength of the orange- red light emitted by atoms of Krypton (86Kr) in a glow discharge tube; one meter was define as 1650763.73 of these wavelength.

o the unit of time was based on a certain fraction of the mean solar day, the average time interval between successive arrivals of the sun at its highest point in the sky.

1967 is an atomic one, based on the two lowest energy states of the cesium atom.

o One second = the time required for 9192631770 cycles of this radiation

November 1983 the standard was change again in a more radical way.

o Meter is the distance light travels in 1/299792458 second.

The common Physical Quantity

Length is a physical quantity for measuring space. The distance between two points.

Mass is a basic property of matter. The mass of an object is measure of the amount of matter it contains. The mass of an onject does not vary with the location. It remains the same even if the position of the object is changed with reference to the earth’s center.

Density is a quantity derived from mass and volume.

Time is the interval between two successive events.




PREFIX ********Abbriviation ************Power of ten
Atto ***************a******************** 10^-18
Femto *************f******************** 10^-15
Pico ***************p******************** 10^-12
Nano **************n******************** 10^-9
Micro *************u******************** 10^-6
Milli **************m******************** 10^-3
Centi **************c******************** 10^-2
Deci ***************d******************* 10^-1
Deca **************D******************* 10^1
Hecto *************H******************* 10^2
Kilo ***************K******************* 10^3
Mega *************M******************* 10^6
Giga **************G******************* 10^9
Tera **************T******************* 10^12
Peta **************P******************* 10^15
Exa ***************E******************* 10^18



References:

Beiser, Arthur. (1992). Modern Technical Physics. Singapore: Addison-Wesley
Publishing Company


Giambattista, A, Richardson, B. and Richardson, R. (2007). College Physics. 2nd Ed. New York: McGraw-Hill Book Companies, Inc.

Giancoli, D.C. (1998). Physics: Principles with Applications 5th Ed. London Prentice Hall International, Inc.

Halliday, D., Resnick, R. and Walker, J. (1997). Fundamentals of Physics. 5th Ed. New York: John Wiley & Sons, Inc.

Urone, Paul Peter. (2004) Physics with health science application. Philippines: Golden
Gate Printer

Young, H.D. and Freedman, R. A. (2000). Unversity Physics. 10th Ed., Singapore: Addison-Wesley Publishing Company, Inc.