Category: Physics

What is the purpose of a control group in psychology? What is a Control Group? The control group (sometimes called a comparison group) is used in an experiment as a way to ensure that your experiment actually works. It’s a way to make sure that the treatment you are giving is causing the experimental results, […]

How do you find density with pressure and height? Pressure is the weight of the fluid mg divided by the area A supporting it (the area of the bottom of the container): P=mgA P = mg A . P=hρg P = h ρ g , where P is the pressure, h is the height of […]

What are 3 examples of an insulator? Examples of insulators include plastics, Styrofoam, paper, rubber, glass and dry air. The division of materials into the categories of conductors and insulators is a somewhat artificial division. What materials are not good insulators? Wool, dry air, plastics, and polystyrene foam are all examples of good insulators. Materials […]

How do you know if your electric motor is bad? Start by completely disconnecting the spindle motor from all power sources. Check each wire, including T1, T2, T3 and the ground wire. If the reading is infinite, your motor should be fine. If you get a zero reading or any continuity reading, you have either […]

What color is starch indicator? Starch Test: Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow. Why starch is used as indicator? […]

What makes a roller coaster go so fast? The kinetic energy that makes a rollercoaster car move at speed comes from the potential energy the car gained when it was hauled to the top of the very first hill on the ride. The further they go down the hill, the faster they go, and the […]

Is Xfinity 2.4 GHz or 5GHz? xFi Gateways are ‘dual band,’ meaning that they broadcast two separate radio bands for their WiFi network – a 2.4 GHz band and a 5 GHz band. Historically, you were encouraged to use a different WiFi name and password for each band. Should I name my 2.4 and 5GHz […]

How do you describe a mineral streak? The streak of a mineral is the color of the powder produced when it is dragged across an un-weathered surface. Streak is particularly important as a diagnostic for opaque and colored materials. It is less useful for silicate minerals, most of which have a white streak or are […]

What biome is Los Angeles California in? Mediterranean Biome Does America have every biome? The term biome usually refers to terrestrial habitats (on land). In North America there are about six major biomes. Which country has the most deadly snakes? AUSTRALIA Which country is most cruel? The global economic impact of violence was $14.3 trillion […]

How do natural forest fires start? Major Causes of Forest Fires Around 80% of forest fires in the United States are caused by humans. Most fires that are started by natural causes are started by lightning. Other natural causes include volcanic eruptions and sparks from falling rocks. What is the biggest cause of wildfires? Human […]