And in any standing wave which has a node at both ends (which must occur since the wave will be ‘fixed’ at both ends, i.e. not free to move at the ends) including a radio wave, the fundamental occurs when the length of the standing wave interference pattern is exactly half a wavelength long, and since the length of this standing wave interference pattern is 1.76 m, this tells you the wavelength of the wave is 2 x 1.76 m = 3.52 m.

Also the speed of the wave will be the speed of any radio wave, which is the same as the speed of light, 3 x 10^8 m/s.

f = v/?, frequency is speed divided by wavelength. So the frequency of the fundamental is
f = (3 x 10^8 m/s)/(3.52) = 8.52 x 10^7 s^-1 = 8.52 x 10^7 Hz = 85.2 MHz.

I know it will do good on curly/wavy hair and no frizz, because I’ve seen the result.

Frizz is caused by brushing hair when it’s dry.

Wash/towel dry, scrunch with gel, blow-dry using diffuser and you’re good to go, while scrunching with fingers.

Celebrations of 90th Anniversary of Romania Unification day & 60th Anniversary of Diplomatic Relation between Romania and India was held in the capital, yesterday at hotel Lalit. Organized by the Embassy of Romania in India.

Lt. Governor Mr.Tejinder Khanna and Mrs.Uma Khanna was the chief guest on the occasion. The opening ceremony started with the national anthem of both the countries.

 On this occasion they had 6 paintings by artist Dipto, 3 depicted the Romanian Culture and 3 on India . The exchange of painting took place as a symbol of sharing each others culture.

 Many eminent celebrities and Ambassadors of different nations were also present to grace the occasion. Col. Shahid (Defense attaché Pakistan), Col. Jindrich hacker and Miroslav Kaspar(Czech Republic), Rajbir Singh and family(M.D. Great waves), Mahinder  Singh(M.D. Ranbaxy) and many more… 

 Mr. Vasile Sofineti said, “I am very grateful to mother India and its people for all the love and support. India and Romania over the years have built a beautiful bond of Friendship”

 Celebrations of 90th Anniversary of Romania Unification day & 60th Anniversary of Diplomatic Relation between Romania and India was held in the capital, yesterday at hotel Lalit. Organized by the Embassy of Romania in India. Lt. Governor Mr.Tejinder Khanna and Mrs.Uma Khanna was the chief guest on the occasion. The opening ceremony started with the national anthem of both the countries.

 On this occasion they had 6 paintings by artist Dipto, 3 depicted the Romanian Culture and 3 on India . The exchange of painting took place as a symbol of sharing each others culture.

 Many eminent celebrities and Ambassadors of different nations were also present to grace the occasion. Col. Shahid (Defense attaché Pakistan), Col. Jindrich hacker and Miroslav Kaspar(Czech Republic), Rajbir Singh and family(M.D. Great waves), Mahinder  Singh(M.D. Ranbaxy) and many more…

Mr. Vasile Sofineti said, “I am very grateful to mother India and its people for all the love and support. India and Romania over the years have built a beautiful bond of Friendship”

H.S.COMMUNICATION

H. S. Communication
http://www.articlesbase.com/culture-articles/celebrating-90th-anniversary-of-romania-unification-day-60th-anniversary-of-diplomatic-relation-between-romania-and-india-684423.html

I am fascinated by how the mind and brain works and how our thought processes are shaped. How do we grow new habits? How do we change our thought processes?

I read an analogy the other day that made a lot of sense to me.

The author compared our minds to a piece of paper that is folded. Try this: fold a piece of paper, then fold it again. Then put the piece of paper down. When you pick it up, the easiest fold to reach is the most recent one.

Our thoughts are the same. Whenever we have a new thought, our minds return to the most recent thought.

This is an incredibly powerful piece of information.

Here is another fact. Our minds and bodies are by default tuned to positive thoughts. One positive thought will counteract a number of negative thoughts.

What does all this mean?

It means we can control our thoughts. If we can do that, we control all the energy waves that emanate from us, and we control the energy that is returned to us.

This is such a simple, yet powerful tool.

Imagine a new colleague joins you at work. You see this person for the first time and notice her lovely eyes. That is the first fold in the paper. Then this person does not introduce herself to you, and her first words are an attack on everyone around her new desk for not clearing the desk drawers before she arrived. That is the second and most recent fold in the paper.

The person then starts to work at a desk five steps from your own desk. You still do not know her name. You have forgotten about her lovely eyes. You now think of her as “that rude woman at the next desk”.

But is she really rude? Could it be that she was not so sure of herself, and that she regarded the new desk as a temporary space for a temporary position where she does not really want to be anyway, and that she was in fact voicing her frustration? Was that why she raised her voice and neglected to introduce herself? Could it be that it is only my perception that she is rude? And that thought then becomes the most recent fold in the paper.

When someone then enters the office and ask where Lynne’s desk is, I have no idea who Lynne is. But if someone points at the desk of the new lady, my first thought is “they mean the rude lady” because that was the most recent thought in the paper of my mind.

I do not think “they mean the new lady with the beautiful eyes”, because that thought has been covered with more recent thoughts, and my mind returns to the most recent thought on the topic.

Then you are away from work for a few days. When you return, the lady walks into the office, approaches your desk, holds out her hand and says “Hi. We have not been introduced yet. My name is Lynne.” She smiles and you think “she has lovely eyes”. That becomes the most recent thought.

I can still go back to the thought of “the rude new lady”, but suddenly it is not that easy. My new thought is about “Lynne with the lovely eyes”, and this thought feels much better.

Every time I now try to think about “the rude lady” I feel a physical reaction in my body that is not pleasant. However, when I think of Lynne with the lovely eyes, I feel a different, far more pleasant physical sensation

We do this every day without even being conscious of our thoughts.

The power of this is that when we become conscious of this process, we can immediately identify a thought that does not resonate with our selves. We can then stop and examine that thought, and replace it with another thought that does resonate with our selves.

Of course with the awareness of the power of our thoughts comes awareness of our selves.

We have all at some stage been involved in an argument where we said things in the heat of the moment and really felt good about winning the argument by being the most hurtful party, only to cringe the next day when we remember what we had said.

Have you ever been involved in some activities with people that at the time felt very good (often under the influence of alcohol and with youthful exuberance), like mercilessly teasing or even bullying other people? And the next day you are so embarrassed about your behaviour that you do not even want to associate with your friends, because they remind you of your moments of weakness.

When we become aware of our thoughts and how positive thoughts resonate with us while negative thoughts trigger feelings of discomfort, it becomes easier to immediately replace negative thoughts with positive thoughts.

Over time it becomes easier to ensure the most recent thought is one that resonates with us and reflects our true loving selves.

While we are in the habit of resonating negative thoughts without an awareness of the impact on our bodies, we feel that replacing those thoughts with positive thoughts is a bit of a strain. However, over a period of time, thinking the positive thoughts becomes practice, and we then try to avoid the negative thoughts.

This is like learning to play the piano. When you focus on the white keys, you manage to play reasonably well. However, when you really make an effort to use the black keys as well, suddenly there is a different, richer, more complete sound that you can control at will. When you reach this level of mastery, playing on the white keys only sounds hollow.

It is possible for us to master our thoughts. The negative thoughts will leave kicking and screaming, but they will leave, if that is what we want for ourselves.

Elsabe Smit
http://www.articlesbase.com/self-improvement-articles/returning-to-the-fold-727289.html

Body boarding is an exciting sport that involves riding waves while lying on the stomach on a special kind of board, known as a body board. The body boards are made of special kind of foam, known as hydrodynamic foam. This foam can glide on water, making riding the waves a breeze even for amateurs. Body boarding should not be considered to be the same as surfboarding, although both of these activities involve riding waves on a board. Body boards are significantly larger and wider than surfboards, and the rider can lie down comfortably on these.

Body boards come in various sizes in order to meet the requirements of people of different heights and weights. There are 37” long boards for people who are around 123 cm in height and somewhere around 55 kg in weight. There are also 46” long, giant sized boards for people who are more than 196 cm tall and weigh more than 100 kg. So, whatever your body type may be, do not worry. If you are dexterous enough, you can enjoy body boarding to your heart’s content.

Body boarders need good boards for riding the waves safely. Riding waves is dangerous, and a good body board can make the difference between life and death in case something goes wrong. If you are looking to buy or rent a body board, look for the following qualities in it before you make your decision:

1. Take a close look at the board. Inexpensive body boards often have a porous surface. These can get waterlogged fairly quickly, and increase in weight. A heavy board has a greater chance of sinking, so make sure the body is solid foam, with not much porosity.
2. Make sure the board is of the right size for you. Hold the body board in an upright position with the tail end touching the floor. The top end should come up to within 2 cm above or below your navel.
3. The surface of the board should be smooth. There should be no jagged edges, cracks, splinters, or gouges on the top surface of the board.
4. Check the underside of the board. If you are a beginner, it is best to choose a board that has its tail curving inward and sloping downward. This kind of boards can glide easily on the water surface, and make steering the board significantly easy.
5. Lay down the body board on the floor. The board should lie perfectly flat on the floor, and should not tilt, or wobble. Perfectly flat boards float better on water than bent boards.
6. Make sure the board is flexible. One way of testing this is to hold the board upright, leaning against your stomach. Gently pull the snout of the board downward. If it bends very easily, or not at all, it is not a good board. It should bend to some extent and then resist any further bending after a while. Flexible boards are good for body boarding, but too much flexibility shows a lack in craftsmanship.

Body boarding is a very enjoyable adventure sport. Make sure you choose the right kind of body board so that you can enjoy riding waves on it safely, and for a long time.

Kilian
http://www.articlesbase.com/shopping-articles/body-boards-watch-before-you-buy-727502.html

mark k

f1(x,t) = A*sin(wt – kx + phi1)
f2(x,t) = A*sin(wt – kx + phi2)

The amplitude of both waves is A, the angular frequency of both waves is w, and the string constant for both waves is k. The two waves have different phase angles phi1 and phi2.

The sum of the two waves is f3(x,t) = f1(x,t) + f2(x,t). We can use the following sine addition formula:

sin(A) + sin(B) = 2*sin[(A+B)/2]*cos[(A-B)/2]

Therefore we can write

f3(x,t) = A*sin(wt – kx + phi1) + A*sin(wt – kx + phi2)
= A*[sin(wt - kx + phi1) + sin(wt - kx + phi2)]
= A*2*sin{[(wt - kx + phi1) + (wt - kx + phi2)]/2}*cos{[(wt - kx + phi1) - (wt - kx + phi2)]/2}
= A*2*sin[wt - kx + (phi1 + phi2)/2]*cos[(phi1 - phi2)/2]

We can re-write this as

f3(x,t) = A3*sin(wt – kx + phi3), where

A3 = A*2*cos[(phi1 - phi2)/2] is the amplitude of the combined wave, and

phi3 = (phi1 – phi2)/2 is the phase of the combined wave.

The ratio of the amplitude of the combined wave to the amplitude of either of the individual waves is

A3/A = 2*cos[(phi1 - phi2)/2] = 1.65 (from the statement of the problem).

Therefore, upon rearranging, one can find the phase difference:

phi1 – phi2 = 2*acos(1.65/2),

where acos is the arc-cosine (or inverse cosine).

Therefore,

phi1 – phi2 = 1.201 radians.

You can convert to degrees by multiplying by 180 degrees and dividing by pi:

(phi1 – phi2)*180/pi = 68.8 degrees.

This should be a good enough answer (neglecting for now the multivalued nature of the inverse cosine function).

When you’re being asked about reflection and refraction, you want to do it within the confines of what makes a wave. In other words, what makes a wave reflect (bounce off or between things)? What causes it to refract (speed up or slow down)?