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 […]

Is the moon slowly turning red? The moon is turning ever so slightly red, and it’s likely Earth’s fault. Our planet’s atmosphere may be causing the moon to rust, new research finds. Rust, also known as an iron oxide, is a reddish compound that forms when iron is exposed to water and oxygen. Do windows […]

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 does a changing magnetic field causes? A changing magnetic field induces a current in a conductor. For example, if we move a bar magnet near a conductor loop, a current gets induced in it. The E.M.F. E induced in a conducting loop is equal to the rate at which flux ϕ through the loop […]

What is the main reason for acid mine drainage? Acid mine drainage (AMD) is the runoff produced when water comes in contact with exposed rocks containing sulfur-bearing minerals that react with water and air to form sulfuric acid and dissolved iron. This acidic run-off dissolves heavy metals including copper, lead, and mercury which pollute ground […]

What animals eat seagrasses? Expand/Collapse What animals eat seagrasses? Sea turtles, manatees, parrotfish, surgeonfish, sea urchins and pinfish feed on Florida seagrasses. Many other smaller animals feed on the epiphytes and invertebrates that live on and among seagrass blades. How do seagrasses get their energy? Seagrasses have roots, veins, and leaves. Seagrasses, like other plants, […]

What is the very first step in the proton-proton cycle? The first step in this process is the collision of two protons where proximity permits the strong nuclear force to bind them together. The resulting combination is not stable, and one of the protons will decay to become a neutron, and this forms a stable […]

Is it safe to swim to a sandbar? The trough can be a gentle swim, but the sandbars around it can also shift to create the rip currents — channeled rushes of water pulling away from shore — that have caused so many drownings and near drownings over the years. “You are always going to […]

What is the 5 step design process? The five stages of Design Thinking, according to d. school, are as follows: Empathise, Define (the problem), Ideate, Prototype, and Test. Let’s take a closer look at the five different stages of Design Thinking. What is the difference between scientific investigation and technological design? Scientific inquiry is used […]