About Mass and Weight ......

It's very easy to do when you're not entirely sure of how science actually defines them. Even though they're both linked, I've put together a fairly comprehensive description which, more importantly, is written in layman's terms and not scientific babble!

WHAT IS MASS?

Mass is a scientific measure of the amount of matter an object is made up of. No matter where you are at given moment in time, mass is constant. So, whether you're walking to the shop to stock up on groceries or bouncing around on the moon, your mass is the same.

Some other key points about mass

1. Mass is indestructible. As you've seen above, no matter where you are in the universe your mass will never change
2. Mass can never be zero. What we mean by this is that everything in the universe has mass. If it didn't it simply wouldn't exist
3. Mass is not related to gravity, centrifugal force, etc and these forces have no effect whatsoever on your mass
4. Mass is commonly measured in kilograms and grams.

WHAT IS WEIGHT?

Weight is a form of measurement that is dependent on gravity and, unlike mass, your weight can vary depending on where you are in the universe.

Some key points about weight

1. The weight of an object changes based on where it is. If you've decided to visit the moon to test out this theory then you'll find that, in a matter of hours, you will have slashed your weight by two thirds (in your face, Slimming World!)
2. Weight is a vector and its direction of pull is towards the centre of the planet you're stood on. What? Sorry, I did promise layman's terms: gravity, which is created by the mass of an object, moves towards the centre of the object and it is gravity that determines your, or any other object's, weight.
3. The weight of any given object can go up or down depending on the amount of gravity acting on it. More gravity - the heavier the object. Less gravity - the lighter the object.
4. Unlike mass, weight can be zero. An example of this is an astronaut floating in space - there's no gravity acting on his body and, therefore, he has no weight.
5. Weight is commonly measured in Newtons.

chellenge to reinforce EM waves

You can copy and then paste the content of this general test in a word file and then go through the resources or use your knowledge to fill the blanks properly.

Physics - 5054
Electromagnetic Waves and Properties
10-Cambridge (GCSE)

Can you fill in the blanks with correct words after search!!

1. ____________________ waves are used to penetrate solids and are used in doctor’s offices and as airports.
2. ____________________ is the distance between one point of a wave to the same point in the next wave.
3. ____________________ is the number of waves per unit of time.
4. ____________________ waves occur when the motion of the medium is parallel to the direction of the wave.
5. ____________________ waves have a color spectrum known as ROYGBIV.
6. ____________________ waves disturb matter.
7. The ________________ is the top of a wave.
8. The ________________ is the bottom of a wave.
9. ____________________ is the maximum distance that matter is displaced from the resting position.
10. ___________________ waves are produced by stars and galaxies.
11. ___________________ waves occur when the motion of the medium is at right angles (perpendicular) to the direction of the wave.
12. ___________________ waves are often used in heat lamps.
13. ___________________ waves are utilized by insects to locate nectar.
14. ___________________ waves are transverse waves that disturb electromagnetic fields.
15. ___________________ waves have the shortest wavelength and the highest frequency.
 Thank You...

Sound Waves

In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water. Sound is a mechanical wave phenomenon and is normally associated with our sense of hearing. Sound is a property of vibrating objects.

• Sound is produced by vibrating sources in a material medium. Medium can be any gas, liquid or solid.
• The vibrating sources set the particles of a medium in vibration in such a way that sound travels outwards in the form of longitudinal waves.
• Some of the energy of the vibrations are transmitted over a distance.

I suggest that you should visit miniphysics.com for further details on factors effecting the sound and properties of sound.

Simple Pendulum

A simple pendulum is a weight suspended from a pivot in a way that it can swing freely. When a pendulum is displaced sideways from its resting or equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released the pendulum after displacing, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude, the width of the pendulum's swing.
I am suggesting a video that i find very simple regarding explaining the features of a simple pendulum.
suggested video for simple pendulum in indian accent 
 I always intend to suggest short timed videos with simple explanations of the phenomenon. I am suggesting another video to learn some specific terminology as well as working principle of a simple pendulum.
suggested video

re-view of the screw gauge

hi
its a video that i already have shared on my blog earlier. however I am posting the link again for the students of 9th C. you can watch the video to revise the method of determining the reading using a micro meter screw gauge.
click here to see the video selected to show the method to determine the reading

I hope you will find the video helpful
regards
kashif jamal

effective content for electromagnetic spectrum

hi
 I want to share a very effective and focused website with all my readers. It has very relevant content that I found very helpful for developing basic understanding. The link for the website is given below:
 Mini Physics
 further more you can search topic wise as I suggested the webpage to my students of X-Cambridge for exploring uses of electromagnetic waves and for that another link in given below that will directly open the required page:
electromagnetic waves and application
hope you will like the search and will find the content interesting and helpful.

yours truely
Kashif Jamal