Category: Physics

At what age are people most physically active? Age The age group 18 to 44 was the most likely to exercise. Of those individuals age 18 to 44, 59.7 percent reported exercising at least three times a week for half an hour or more. This compares with 53.5 percent and 46.7 percent, respectively, for the […]

What element is a good insulator? Examples of good conductors are sliver, tin, and lead. Good insulators contain 8 electrons which mean they are stable(noble gasses group 18). Insulators can’t be easily transported from one atom to another and nonmetals make good insulators. Three examples of good insulators are sulfur, silicon, and rubber. What makes […]

What are the features of a sedimentary rock? Sedimentary rocks contain rounded grains in layers. The oldest layers are at the bottom and the youngest layers are at the top. Sedimentary rocks may contain fossils of animals and plants trapped in the sediments as the rock was formed. What type of minerals are found in […]

Is thermal energy the total kinetic energy of an object? Thermal energy is the total internal kinetic energy of an object due to the random motion of its atoms and molecules. It is sometimes confused with internal energy or thermodynamic energy. They consist of the sum of the internal kinetic energy (thermal energy) and the […]

What is the power of an appliance? The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where: 1 W = 1 J/s (joule/second). Appliances used for heating have a much higher rating than those used to produce light or sound. […]

Why does a straw look bigger in water? Place a straw in a glass of water, and behold: It looks broken. But below, when the light also travels through water, the refraction causes the image of the straw to be in a slightly different location. The water also acts as a type of magnifying lens, […]

Under what condition concave lens form a real image? Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point, and this real image is inverted. What does a concave lens do to an image? A lens refracts light and […]

What does 4 mean in the formula 4na2so3? Answer: The ‘4’ in front of sodium sulfate formula indicates that there are four molecules of sodium sulfate. What does the 4 mean in the formula 4na2so3 there are four atoms of sodium there are four atoms of sodium sulfite There are four molecules of sodium sulfite […]

Is driving long distance bad for the car? Depreciation Costs: A long road trip can inflict costly damage on your car, even if you don’t notice it right away. Every mile results in a certain amount of wear and tear to the engine, the tires and other moving parts. ItStillRuns offers an easy way to […]

Is Controlled burning good? A controlled burn is a wildfire that people set intentionally for a specific purpose. Well-thought out and well-managed controlled burns can be incredibly beneficial for forest management—in part because they can help stop an out-of-control wildfire. What is controlled burning method? Controlled burning, also known as prescribed burning, involves setting planned […]