Category: Physics

Why can I not compress images in Word? Turn off compression in Word, PowerPoint, or Excel Click File > Options. In the Options box, click Advanced. In the list at Image Size and Quality, do one of the following. (This example shows the options in Word.) Under Image Size and Quality, select the Do not […]

Do you have to preheat a convection oven? Yes, all convection ovens need to be preheated. In some modes, more than one element is used during preheat, which can cause the food to burn. The oven will indicate when it has finished a preheat cycle. You should always start with a hot oven or a […]

Can a comet become a meteor? Comets: Comets are dirty space snowballs of mostly ice and dust that formed during the birth of the solar system 4.6 billion years ago. Most comets have stable orbits in the outer reaches of the solar system past the planet Neptune. When meteoroids collide with a planet’s atmosphere, they […]

How do you check if your immune system is strong? Your body shows signs of a strong immune system pretty often. One example is when you get a mosquito bite. The red, bumpy itch is a sign of your immune system at work. The flu or a cold is a typical example of your body […]

Why do people put their wheels under a heavy box? Why does placing wheels under a heavy box reduce the necessary force required to push it along at a constant speed? The wheels are causing less friction between the ground and the box. In order to push it, less force is needed. When the brake […]

What is light wave made of? YES! Light is made of discrete packets of energy called photons. Photons carry momentum, have no mass, and travel at the speed of light. All light has both particle-like and wave-like properties. What are 3 characteristics of electromagnetic waves? Characteristics of electromagnetic waves As you learned in Wave Motion, […]

What is the ocular lens used for on a microscope? Ocular Lens – The ocular lens, or eyepiece, magnifies the image. It contains a measuring scale called and ocular micrometer. The ocular micrometer has no units. Revolving Nose Piece – Several objective lenses of varying magnification and numerical aperture are mounted on the revolving nosepiece. […]

Is baking bread an exothermic reaction? In addition to smelling delicious, baking bread is an endothermic example. The flour, yeast, and other ingredients used in creating the dough are heated. They absorb the heat making chemical reactions happen. Is Melting ice exothermic or endothermic? As a result, the temperature of the ice rises and it […]

What is the slope of the line with vector equation? Clearly the answer is that the slope is the dot product of the two vectors: slope = g · u. There are two ways to think of the slope of a linear function in a given direction. We can use a symbol, such as s, […]

Which mixture can be separated? A mixture is a material containing two or more elements or compounds that are in close contact and are mixed in any proportion. For example, air, sea water, crude oil, etc. The constituents of a mixture can be separated by physical means like filtration, evaporation, sublimation and magnetic separation. What […]