Category: Physics

How is temperature determined? Temperature is the quantity measured by a thermometer. Temperature is related to the average kinetic energy of atoms and molecules in a system. Absolute zero is the temperature at which there is no molecular motion. There are three main temperature scales: Celsius, Fahrenheit, and Kelvin. Does reheating meat kill bacteria? Proper […]

Did Einstein say we Cannot solve our problems with the same thinking we used to create them? The supposed Einstein quote from Skeptic reads “the world we have made as a result of the level of thinking we have done thus far creates problems that we cannot solve at the level of thinking at which […]

Does your weight change in an elevator? When the elevator is moving, we will weigh our normal weight. Since we are already moving at the same speed as the elevator (up or down), nothing is affecting us to change our weight. However, when the elevator starts to go or stops, our body resists it. The […]

How do you add two vectors using their components? Again, the component method of addition can be summarized this way: Using trigonometry, find the x-component and the y-component for each vector. Add up both x-components, (one from each vector), to get the x-component of the total. Add up both y-components, (one from each vector), to […]

How can we make this object move? Force can make things move, change shape or change their speed. Some forces are direct and happen when two things touch (like a foot kicking a ball) or over a distance (such as a magnet or gravity). Friction is the force between two objects in contact with each […]

Is there gravity in a vacuum? In a vacuum, gravity causes all objects to fall at the same rate. The mass of the object does not matter. If a person drops a hammer and a feather, air will make the feather fall more slowly. But if there were no air, they would fall at the […]

What will be the pulse rate during heart attack? A very high or very low heart rate may reveal your risk for heart attack. For most people, a heart rate that’s consistently above 100 beats per minute or below 60 beats per minute for nonathletes should prompt a visit to a doctor for a heart […]

Is TT tall or short? Genotype Symbol Genotype Vocab Phenotype TT homozygous DOMINANT or pure tall tall Tt heterozygous or hybrid tall tt homozygous RECESSIVE or pure short short Is blue eyes a genotype or a phenotype? Finally, the genotype of an organism with two recessive alleles is called homozygous recessive. In the eye color […]

What happens if you put a pencil in a glass of water? As you sight at the portion of the pencil that was submerged in the water, light travels from water to air (or from water to glass to air). This light ray changes medium and subsequently undergoes refraction. As a result, the image of […]

What can affect a compass reading? Metal that has a lot of iron in it’known as ferrous metal?can impact a compass. A large object such as a car or tower can draw the magnetized needle, making a precise reading difficult to secure. Even soil with a lot of iron in it can tweak your results. […]