Category: Physics

Why should foods be refrigerated? Refrigeration slows bacterial growth. Bacteria exist everywhere in nature. They are in the soil, air, water, and the foods we eat. When they have nutrients (food), moisture, and favorable temperatures, they grow rapidly, increasing in numbers to the point where some types of bacteria can cause illness. What is the […]

Which is more effective way to increase the efficiency of a Carnot engine? The efficiency of the carnot engine can be increased by either increasing the sink temperature or by decreasing the reservoir temperature. What are limitations of Carnot cycle? isentropic process is possible if it very fast. This alternate combination of very fast, very […]

Why is electricity so cheap in Iceland? This is one of the plants that enables Iceland to produce 100 per cent of its grid electricity from renewable sources. It’s all either geothermal or hydro. Electricity prices are low in Iceland, especially for the aluminum smelting industry. Can you drink the water in Iceland? Yes, it […]

Is it safe to breathe in ozone? When inhaled, ozone can damage the lungs. Relatively low amounts can cause chest pain, coughing, shortness of breath and throat irritation. Ozone may also worsen chronic respiratory diseases such as asthma and compromise the ability of the body to fight respiratory infections. Can ozone cure Lyme disease? Ozone […]

What is the force of a car crash? force equals mass times acceleration. In this case, the acceleration is (v – 0)/t, where t is whatever time it takes car A to come to a stop. The car exerts this force in the direction of the wall, but the wall, which is static and unbreakable, […]

Is a 5 cm tumor big? The smallest lesion that can be felt by hand is typically 1.5 to 2 centimeters (about 1/2 to 3/4 inch) in diameter. Sometimes tumors that are 5 centimeters (about 2 inches) — or even larger — can be found in the breast. What stage is a 5 cm tumor? […]

Is magnetic field inside a toroid zero? The magnetic field lines inside the toroid are concentric circles. The magnetic field is homogeneous inside the toroid and zero outside the toroid. We asses the direction of the magnetic B-field by the right-hand rule. Why is there no magnetic field outside a toroid? After applying Ampere’s Law, […]

What happens to the speed of a body when a force is applied? Answer. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force. The body might speed up, slow down or change direction, after which, the body will continue moving at a […]

When you reach the top of your jump on a trampoline? Your kinetic energy is greatest, just before you hit the trampoline on the way down and when you leave the trampoline surface on the way up. Your kinetic energy is 0 when you reach the height of your jump and begin to descend and […]

How can I double my money in one year? Here are some options to double your money: Tax-free Bonds. Initially tax- free bonds were issued only in specific periods. Kisan Vikas Patra (KVP) Corporate Deposits/Non-Convertible Debentures (NCD) National Savings Certificates. Bank Fixed Deposits. Public Provident Fund (PPF) Mutual Funds (MFs) Gold ETFs. What to do […]