You might remember the heroic role that newly-invented radar played in the Second World
War. People hailed it then as "Our Miracle Ally".
But even in its earliest years, as it was helping win the war, radar proved to be more than an expert enemy locator. Radar technicians, doodling away in their idle moments, found that they could focus a radar beam on a marshmallow and toast it. They also popped popcorn with it. Such was the beginning of microwave cooking. The very same energy that warned the British of the German
Luftwaffe invasion and that policemen employ to pinch speeding motorists, is what many of us now have in our kitchens. It's the same as what carries long distance phone calls and cablevision. Hitler's army had its own version of radar, using radio waves. But the trouble with radio waves is that their long wavelength requires a large, cumbersome antenna to focus them into a narrow radar beam. The British showed that microwaves, with their short wavelength, could be focussed ina narrow beam with an antenna many times smaller.
This enabled them to make more effective use of radar since an antenna could be carried on aircraft, ships and mobile ground stations. This characteristic of microwaves, the efficiency with which they are concentrated in a narrow beam, is one reason why they can be used in cooking. You can produce a high-powered microwave beam in a small oven, but you can't do the same with radio waves, which are simply too long. Microwaves and their Use The idea of cooking with radiation may seem like a fairly new one, but in fact it reaches back thousands of years. Ever since mastering fire, man has cooked with infrared radiation, a close kin of the microwave. Infrared rays are what give you that warm glow when you put your hand near a room radiator or a hotplate or a campfire. Infrared rays, flowing from the sun and striking the atmosphere, make the Earth warm and habitable. In a conventional gas or electric oven, infrared waves pour off the hot elements or burners and are converted to heat when they strike air inside and the food. Microwaves and infrared rays are related in that both are forms of electromagnetic energy. Both consist of electric and magnetic fields that rise and fall like waves on an ocean. Silently, invisibly and at the speed of light, they travel through space and matter. There are many forms of electromagnetic energy (see diagram). Ordinary light from the sun is one, and the only one you can actually see. X-rays are another. Each kind, moving at a separate wavelength, has a unique effect on any matter it
Twelve years a slave is the title of a book and a movie which was an adaptation of the life of Solomon Northup. Solomon Northup was born in New York a free man. He had a wife and three children, he unlike most other children was educated.”Besides giving us an education surpassing that ordinarily bestowed to the children in our condition” he said page 25, he had a farm and worked as a violinist. He was drugged, abducted and sold into slavery in 1841 while on a visit to Washington, sold at auction and shipped to work in cotton plantations in Louisiana. He was given a new identity and his slave name was “Platt.” he never accepted being
The movie 12 Years a Slave, is an exceptional film. It shows how brutal and inhumane American Slavery is. The movie itself is shockingly truthful as to the events that actually happened. There were many scenes that made it hard to not look away from the screen. Along with numerous scenes of trying to hold back tears. This movie is filled with heartache, sorrow, pure utter violence, but also love. There were many amazing actors and actress’ in this movie. Altogether, this film was brilliant. In fact, it has won many awards. Including, an Academy Award for Best Picture, Best Supporting Actress, Best Writing Adapted Screenplay, and many more outstanding awards. This movie is brutally honest, but well deserved. A free-man was
Reading, Gwem. "Radar Operator in WW2." Letter. 8 Nov. 2003. N.p.: n.p., n.d. N. pag. BBC WW2 People's War. Web. 23 Apr. 2014.
Trujillo, K. M., Tracing the Roots of Mathematics Anxiety through In-Depth Interviews with Preservice Elementary Teachers http://findarticles.com/p/articles/mi_m0FCR/is_2_33/ai_62839422 [accessed July 2007]
It was a very eye opening movie that made me rethink slavery. The director does an incredible job of making the movie historically accurate and seems to show all angles of slavery. I feel like I learned the way that slaves were treated. They were seen as property, but not valuable property. Slaves were also judged on more than how strong they were. A smart slave could be seen as just as valuable as a strong slave. The last thing that I learned from this movie is that not all of the slave owners and their workers are cruel to the slaves. Some were respectful and kind to the slaves as long as the slaves worked hard and showed
In spite of the fact that getting the bravery to ask, might be troublesome and humiliating ask in any case since it is less demanding to end it now instead of later. Be generous and don't be protective once they have imparted their insights. Presently these propensities will be the known propensities, the propensities great loved ones have seen for quite a long time and were holding up to outline for you. These known propensities are in some cases the hardest to talk about on the grounds that, as it were, they influence family and companions more, while pride obstructs. However before one anticipates getting out from under a negative behavior pattern there must be a solid individual intention in change in any
In today's world, technology is constantly changing from a new paperclip to an improvement in hospital machinery. Technology lets people improve the way they live so that they can preserve their own personal energy and focus on the really important factors in life. Some people focus their energy on making new innovations to improve transportation and the health of people that may save lives and some people focus on making new designs of packaging CDS. Technology is significant in everyone's life because it rapidly changes what is in the market. But, some new innovations of technology are ridiculous because they serve no purpose in helping mankind.
The pain and agony of knowing that I might not be prepared for college classes is a weight I have bore on my shoulders. One of my goals has always been to lift the stress of college classes off my back and have the assurance that I am ready for the challenges that are ahead of me. Since day one of high school, being engaged while learning has been my biggest desire so that I am well prepared for the next step in life: college. Dual Enrollment English was exactly what I needed to be well prepared for college. All of my high school career, I had never known what it actually meant to do well and be ¨successful.¨ An abstract idea occurred to me, in room 201, as I was sitting in the front row of my Dual Enrollment English 111 class; this idea
Saying 12 Years a Slave is a realistic film is an understatement. According to the British film director Steve McQueen, some people did not want the film made. He stated, “Some people want to close their eyes on some subjects. They don’t want to look behind them.” (Aspden 5). Others feel there have been too many films been made about slavery already, such as Roots, Django Unchained, and Amistad. 12 Years a Slave is a true story that needs to be told. In this writer’s opinion, it depicts the abuse of slavery in the United States with more intensity than any other film previously made.
In spite of the fact that getting the bravery to ask, might be troublesome and humiliating ask in any case since it is less demanding to end it now instead of later. Be generous and don't be protective once they have imparted their insights. Presently these propensities will be the known propensities, the propensities great loved ones have seen for quite a long time and were holding up to outline for you. These known propensities are in some cases the hardest to talk about on the grounds that, as it were, they influence family and companions more, while pride obstructs. However, before one anticipates getting out from under a negative behavior pattern there must be a solid individual intention to change in any
The effects of slavery forever changed not only these lives but also how we view humanity now. During the movie and also throughout history, slaves were sold at auction to be become a master 's property and nothing was said. Many slaves had to give up their families, forced to be split between different owners. This happened in the beginning of the film when Solomon and the other slaves were being auctioned. Master Ford was purchasing a black woman named Patsy, and felt some sympathy when she said she did not want to break her family apart and asked to purchase her daughter. The slave auctioneer refused saying she’ll be worth more money in the long run for himself. Master Ford
Radiation is when the heat energy travels in actual waves. The suns energy gets to earth because of radiation. These three types of heat transfer can be easily found in the activities we have been doing the past couple of weeks having to do with a universal dwelling. They can mostly be seen when we are trying to test the heating and cooling capabilities of our universal home model.
12 Years a Slave shows the brutality that the slaves went through and how much determination they really had. Throughout
As discussed above, it is apparent that people need to know that non-renewable resources are not readily available, and they usually take extended periods before to replenish. Due to this effect, it is crucial to consider using the natural ones as they are always available in the environment. Unlike non-renewable resources, renewable ones cannot be exhausted even if there is a high increase in demand because they are natural sources of energy. Aside from that, making the topic as top priority will create awareness of the effects associated with the use of non-renewable resources thereby turning people to adopt other alternatives that do not cause harm to the environment as well as their wellbeing. Furthermore, this will reduce the rate at which individuals neglect the use of renewable sources of