Category: Physics

What is a good U value for insulation? The best insulating materials have a U-value of close to zero – the lower the better. Building regulations currently stipulate that for a new building, the elements must have maximum U-values as follows: Wall – 0.3 W/m2k. Roof – 0.15 W/m2k. What is the most energy efficient […]

What would a historian most likely do to piece together clues about the human past quizlet? A historian most likely would piece together clues about the human past by studying written records. What kinds of excavations might be found underwater? As a result, underwater archaeological sites cover a vast range including: submerged indigenous sites and […]

Why is steam so powerful? The water is still nearby, but it’s now in a gaseous form called steam. This form of water is also called water vapor, and it’s very powerful stuff. This is because steam has a lot of energy. This is because as you continue to add more heat, more water molecules […]

Are all atoms the same in an element? Yes, all things are made of atoms, and all atoms are made of the same three basic particles – protons, neutrons, and electrons. But, all atoms are not the same. You know that the number of protons in an atom determines what element you have. What property […]

What happens if 2 objects have the same speed but different velocities? Objects have the same velocity only if they are moving at the same speed and in the same direction. They represent objects that have different velocities only because they are moving in different directions. A and C represent objects that have different velocities […]

What can cause a population to be in a uniform distribution? Uniform patterns of dispersion are generally a result of interactions between individuals like competition and territoriality. Clumped patterns usually occur when resources are concentrated in small areas within a larger habitat or because of individuals forming social groups. What are the factors for population […]

Is running 3km a day enough? Your body will become increasingly able to run 3km. That’s not very far, in terms of exercise. A little under 2 miles, or, at most folk’s running pace, perhaps 16–20 minutes of work. That’s not bad… But for many people once you got to that point it would be […]

Do turbo engines have more problems? Turbo engines tend to have more problems in many cars, although there are turbocharged engines that are reliable. A turbocharged engine has more components than a naturally-aspirated (non-turbo) motor. A turbocharger itself is not uncommon to fail. The more parts, the more can go wrong. How long should you […]

What is the best type of energy storage? Lithium-ion batteries What are the main methods of energy storage? Energy can be stored in a variety of ways, including: Pumped hydroelectric. Electricity is used to pump water up to a reservoir. Compressed air. Electricity is used to compress air at up to 1,000 pounds per square […]

What is effective overburden pressure? When the soil is subjected to some load, it transfers the load to water in the pores and soil grains. This is defined as effective overburden pressure and otherwise will be called as inter-granular stress or effective stress. It increases with increasing depth of soil. What is Geostatic pressure? 1. […]