Physics is in every area of life from the starry skies we see at night to the cells inside our bodies. Even what might appear to be the simplest thing is actually very complex when one looks at the details. Physics helps us understand the basics of how life operates. Microwave ovens are often used to reheat left over food, cook TV dinners and frozen foods, and to quickly heat food but is seldom recognized and understood by those who use them. People typically don’t know how a microwave oven operates, how it is structured, or how the food is actually heated.
Microwaves were first created in 1947 being 1.8 meters in height and 750 lbs created by Percy Spencer while building magnetrons for radar sets during World War II. The magnetrons would allow the radar sets to indicate where the enemy machinery was located, since the microwaves would reflect off metal. When Percy Spencer was<> working with the microwaves he noticed that a chocolate bar melted when exposed to the microwaves. Testing the capability of the microwave to cook food he used first popcorn which was successful and secondly an egg which exploded. The first microwaves, then called the Radarange, were used only in the military and for large restaurants due to their size, then the size was decreased in the 1952's and was priced $1295 which models the microwaves we see in households today.
According to Miriam-Webster's Dictionary an electromagnetic wave is "one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X rays, and gamma rays." What this actually means is that electromagnetic waves have both electric and magnetic fields that o...
... middle of paper ...
...g tough many people will stick a moist paper towel or napkin over the bread lockingthe moisture in and keeping it soft.
TV dinners as we all know are usually made for the microwave as well as other types of quick meal foods. These foods usually are frozen so they have a substantial amount of moisture which evaporates unneeded water, but doesn’t dry out the food as it is being cooked.
As many have heard it is not a good idea to cook an egg in the microwave, as the inside of the egg heats up it expands, however the shell on the outer surface is a solid rather than a fluid so it doesn’t expand as rapidly or as much as the liquids on the inside do therefore causing the egg shell to break. An egg shell break is not typically such a bad thing on the stove since the egg is being slowly warmed up, but in the microwave it heats up even more quickly and explodes.
What you are going to do first is put corn oil on your palms, so that the dough will not stick to your hands.
The eggs when dropped in the egg lab will either break or not break upon impact with the object. The eggs will break when they hit the frying pan. The eggs that are dropped into the bucket of water will sometimes break and sometimes stay whole. The eggs that are dropped onto a pillow will not break.
We don’t have to explain about how do the objects works because we know the purpose of the objects are designed like that. For example, we know the purpose of the hair dryer which it is use to blow dry our hair. Therefore you do not need any physics principle to explain to use it, in fact you just have to press the start button to use the hair dryer.
Another science that relates to potential energy is kinetic energy. Kinetic energy is the energy something has because an object is moving. Dropping a soccer ball converts the potential energy to kinetic energy. In all, energy makes things happen which is why energy can also be called the
For as long as I can remember, I have been curious about almost everything. This curiosity of mine has led me to unravel the mystery of how things work and how they are formed. According to BSM Consulting, author of High-Level Description of the Sixteen Personality Types “The Mechanic,” “ISTPs have a compelling drive to understand the way things work and they like to take things apart and see the way they work” (BMS, “The Mechanic” par.2). One day, when I was about fourteen, I was microwaving popcorn. While waiting for the kernels to pop, I began to wonder about the components required to build a microwave oven and how those components work. I found a screwdriver and systematically began to take apart the microwave. Inside, along with numerous tubes and wires, was the heart of the oven: the magnetron. The ...
Physics can be found in all aspects of our lives and the world around us including the activities in which we find the most enjoyment. They may not be noticeable to the naked eye or even to our senses but they are there and when we become familiar with the concepts of physics then we began to ‘see’ physics everywhere.
Microwaves are last on the Pentagon’s list of worries for beam weaponry. Microwaves, in general, get only one percent of the fiscal budget. Since the microwave research and development program received only 1.5 to five billion dollars. Articles published in the 1970s criticized microwave companies for leaks and complaining the about industry had not developed safety standards. Some of the articles published were not entirely true and the public took every bit of the articles seriously. The article, “The Zapping of America: Microwaves, Their Deadly Risk and the Cover Up” was mainly about how dangerous microwaves were in the public, but there were multiple misconceptions throughout the article. High power microwaves offer advantages over lower
The microwave oven revolutionized cooking, making it quick and trouble-free to prepare a complete meal. Dr. Percy Spencer was working for the Raytheon Manufacturing Company in 1946, when he accidently stumbled upon the invention of the microwave. According Raytheon the production to the first microwave was in 1954. The first microwave was too large for everyday home use. It was mainly used commercially, in restaurants and large company buildings. “The first oven was 670 pounds, sixty-two inches tall, nearly two feet deep and wide. To install it, an electrician had to put in a 220-volt line and a plumber had to install a water pipe to cool the oven’s radar tube. This first oven sold shortly after the war ended for more than $2,000, the equivalent of about $20,000 today” (Invention and Technology Magazine pg 126). The first home microwave was invented in 1964, by Richard Foerstner. It was made to appeal to women, since women where the ones who would be using it the most. The microwave was primary technology that other companies started to adapt their products to it. TV dinner’s packages were changed so they could be placed in the microwave, because the metal trays would damage it. Frozen pizza companies changed the sizes of pizzas so women could just place them in the microwave for a conv...
In these commentaries, Schwarcz also answers questions that people and the media have and offer advice to people. For example, a listener asked “How long one should allow microwaved food to stand after cooking to ‘allow the microwaves to escape?” He responded by describing how the food on the inside is cooked through the heat transfer from the exterior, which allows the food to finish cooking. Additionally, it is essential to leave the food to stand for a few minutes. However, this does not allow the microwaves heat to leave, but for the interior to finish cooking as well as the exterior. If you don’t leave the food to settle there for a few minutes than it will leave the cooking process incomplete.
Several versions of the home radiator were invented in the mid 19th century. One of the early versions was invented by a man named Franz San Galli sometime between 1855-1857. In 1863,
In an electromagnetic wave, the constantly changing electric and magnetic fields affect each other so they both oscillate in different axis while the wave moves in a direction perpendicular to the oscillation of the fields as shown in Figure 1.
As discussed in class, submission of your solutions to this exam will indicate that you have not communicated with others concerning this exam. You may use reference texts and other information at your disposal. Do all problems separately on clean white standard 8.5” X 11” photocopier paper (no notebook paper or scratch paper). Write on only one side of the paper (I don’t do double sided). Staple the entire solution set in the upper left hand corner (no binders or clips). Don’t turn in pages where you have scratched out or erased excessively, re-write the pages cleanly and neatly. All problems are equally weighted. Assume we are working with “normal” pressures and temperatures with ideal gases unless noted otherwise. Make sure you list all assumptions that you use (symmetry, isotropy, binomial expansion, etc.).
All university students know the convenience and importance of the microwave. The microwave is particularly important for students living in the Towers, as this is their only kitchen appliance. Since microwaves are a staple for university students, they become dirty quickly. The best way to keep microwaves clean is to clean up spills immediately. If you can 't, however, do this, follow the steps below. Your microwave will be spotless again almost instantly.
By the time the 20th century arrived, vacuum tubes were invented that could transmit weak electrical signals which led to the formation of electromagnetic waves that led to the invention of the radio broadcast system (750). These vacuum tubes were discovered to be able to transmit currents through solid material, which led to the creation of transistors in the 1960’s (750).
The microwave is a prime example of technology making us happy. If we were to get rid of the microwave, many people would be angry because it is a very helpful and time saving device. If there was no microwave people would not be able to defrost the ground meat they forgot to leave out, nor would they be able to cook a hot pocket for lunch when they were short on time. Some people believe that items that are efficient make society happy.