Category: Physics

What best compares radiation and conduction? The statements that best compares radiation and conduction are the following: both transfer thermal energy from warm objects to cooler objects and both can transfer energy through matter. The difference is that conduction is through direct heat transfer; whereas, radiation transfers heat through waves. What describes how radiation moves? […]

Can you drive without airbags? It’s not illegal to drive without airbags, if your vehicle was manufactured before 1989. So the question then arises: What happens if you have no airbags and get into a crash? Airbags help slow down the change in momentum and help reduce the forces in a crash. How unsafe is […]

When the economy is at full employment the unemployment rate is zero? Full employment does not mean zero unemployment, it means cyclical unemployment rate is zero. At this rate, job seekers are equal to job openings. This is also called the natural rate of unemployment (Un) where real GDP is at its potential GDP. When […]

How do humans use radiant energy? Heat created by the body can be radiant energy. A surface heated by the sun converts the energy of the light into infrared energy which is a form of radiant energy. Cell phones utilize radiant energy to function. Magnetic motor generators that utilize neodymium magnets create radiant energy. What […]

What does the 2 stand for in li2o? The ionic formula for Lithium Oxide is Li2O . This makes oxygen a O−2 anion. Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two Li+2 cations will balance with one O−2 anions. What is the […]

Is prophethood the most important article of faith? “Prophethood is the most important Article of Faith.” divergent views within Islam • Refer to sources of wisdom and authority. What are the main beliefs of Shia? Shia Muslims believe that just as a prophet is appointed by God alone, only God has the prerogative to appoint […]

Should you lean forward while skiing? You only need to lean forwards enough to put your centre of gravity over the middle of the ski. The reason that this has become a myth is that one of the most common mistakes made by people learning to ski, is that they lean back, and that instructors […]

Can water be affected by a charged rod? Yes! Water is a polar molecule which means that one side is postively charged and the other negatively charged. A charged rod can attact one side of the water molecule. When you run a thin stream of water and place a charged rod near it, the water […]

How do you measure high temperature? Pyrometer, device for measuring relatively high temperatures, such as are encountered in furnaces. Most pyrometers work by measuring radiation from the body whose temperature is to be measured. How do you measure temperature over 100 degrees? Fahrenheit and Celsius are two different scales for measuring temperature. A thermometer measuring […]

What is tertiary motion? Tertiary motion is sequence motion. It is determined by the specific use oi one or several ofthese transition devices: the cut, the jump cut, the dissolve, the wipe, the fade, and special transitional effects. The cut is an instantaneous change from one image to another. What are the primary motions? For […]