Sign Up Now
Get instant access to over 1 million+ study documents
OR
Already registered? click here to login
By creating your account, you agree to our terms of service, privacy policy and student honor code.
Physics
The heat engine or heat pump moves heat from one location to another. It usually takes heat out of the air or from the ground and transfers it to a building, such as a house or office. The word "heat" means thermal energy not temperature. Rather than warming the house or office with a furnace that burns fuel, the heat is transferred from the air or ground by using this pump. The heat pump uses a chemical substance or machine to work. Heat pumps can be used for making spaces warmer or cooler. For example, air-to-air pumps use electricity to move heat. By doing so, a cool area becomes cooler and a warm area becomes warmer. In the cooler seasons of fall and winter, these heat pumps warm the inside of the homes. In the summer months, they transfer air that cools the buildings.
A vibration in an item creates sound waves. The waves...
For example, when the skin of a drum is hit with a stick, the skin vibrates, or moves up and down, many times per second. This pushes the air surrounding the drum to make sound waves that are picked up by the human ear.
Electricity is related to charges of electrons and protons in the billions of atoms in the environment. The amount of the charge is equal for each particle, but the sign is the opposite. Electrons, orbiting outside of the nucleus, hold a negative charge; protons, in the center or nucleus of the atom, hold a positive charge. The protons are located in the center of the atom, concentrated in a small area called the nucleus. Electricity occurs because the protons cannot escape and the electrons are continually moving. There are numerous items that are…
Energy is transported through waves, such as sound waves. Electromagnetic is another form of these waves. Light is an example of an electromagnetic wave. Other electromagnetic waves include the microwaves in a microwave oven and radio waves and TV waves transmitted from broadcast stations. Waves look like the waves in an ocean, going up and down. The top is called the crest. These electromagnetic waves are different in wavelength, or the distance between one wave crest to the next.
Many chemical elements are found in solids, liquids and gases of the earth. These are all listed on the periodic chart or table. As scientists increase their knowledge, they are also finding new elements. For example, in 2009, Sigurd Hofmann at the Center for Heavy Ion Research in Darmstadt, Germany, added element 112. This was not a natural element, but a manmade one. To produce it, Hofmann fired a beam of charged zinc atoms at lead atoms with a machine called a particle accelerator. The nucleus from the zinc and the nucleus from the lead joined together or fused and they made this new element called ununbium. After that, similar manmade elements were added for 113-118: Ununtrium, Ununquadium, Ununpentium, Ununhexium, Ununseptium, Ununoxium. There is still some controversy about these, since they are so new.
Nuclear energy is produced either by splitting large nuclei and releasing the energy or combining the smaller nuclei. Nuclear energy supplies countries with electricity. Nuclear energy has advantages and disadvantages. It does not pollute the air, such as oil. However, the water used in the process becomes radioactive, which is very harmful to life. Nuclear waste has to be safely stored, and it lasts for a very long time.
A phase change is what occurs when matter moves from one of these states to the other. The melting of ice into liquid water, for instance, constitutes a phase change, just as the boiling of water into invisible water vapor, or the condensing of gaseous water vapor in the air into liquid water on a cool windowpane or glass of water, are also phase changes. Phase changes generally require a
Physics of Magnetism An Overview of the Exciting World of the Modern Physics of Magnetism and Magnetic Fields The Physics of Magnetism and Magnetic Fields Today, magnets and magnetism literally help the world go 'round and these fundamental forces have provided the source for countless innovations that have improved the standard of living for many people. As can be seen in the graphic on the cover, magnetic field lines are a way to
Physics of Swimming Swimming is a sport as well as exercise done in a water body which involves the movement of every body part and dragging the movement against the water body. Individuals practicing swimming wear swimming suits, which are specially designed form of clothes used while in water based activity (Haphaestus, B., 126). Swim suits help in reducing drag in water which in turn improves the propel lance in water. The
Cosmological interpretations of the universe continue to predominate in many Eastern cultures, and a majority of Americans, knowing their zodiacal sign intimately, read their horoscope every morning with their coffee and Pop Tarts. Many people still celebrate Easter, although its connection with Ishtar might cause some of them pause, and Christmas and New Year's are modern ceremonial rituals connected with these early creation myths on a level that must
According to Newton, "To every action there is always opposed an equal reaction; or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts," (Zimmerman, 2008). In the act of pushing a pencil, the energy placed into pushing the pencil does not simply disappear with the writing. Most people write on flat, hard surfaces, such as wooden or acrylic desks. When these
Aurora Borealis The Physics of Aurora Borealis The solar wind consists of highly ionized electrons and protons emitted from our sun.[footnoteRef:2] When these charged subatomic particles interact with the Earth's magnetic field, it creates a spectacular light display called the Aurora Borealis in the northern hemisphere and Aurora Australis in the southern hemisphere. These displays of light are best understood using particle physics. The force on a charged particle (F) is equal