What is obesity What are its causes and risk factors Class 11? Obesity is primarily caused by an imbalance between calories consumed and calories expended. However, many risk factors contribute to the disease. What can prevent obesity? Obesity prevention for adults Consume less “bad” fat and more “good” fat. Consume less processed and sugary foods. […]
Are beta rays harmful?
Are beta rays harmful? Beta particles are capable of penetrating the skin and causing radiation damage, such as skin burns. As with alpha emitters, beta emitters are most hazardous when they are inhaled or swallowed or absorbed into the blood stream through wounds. Gamma rays and X-rays: Gamma rays and X-rays are penetrating. How do […]
Is C-O more polar than Oh?
Is C-O more polar than Oh? Since ketones lack an OH, they are incapable of intermolecular hydrogen bonding. Another way to think about it is that there is a bigger electronegativity difference between O and H rather than between O and C, so the alcohol is more polar. Is C-CL more polar than CO? As […]
How much bandwidth is there in 0.5 microns of spectrum at a wavelength of 1 micron?
Why does vaporization require more energy than melting?
Why does vaporization require more energy than melting? Notice that for all substances, the heat of vaporization is substantially higher than the heat of fusion. Much more energy is required to change the state from a liquid to a gas than from a solid to a liquid. This is because of the large separation of […]
What plastics are safe for hot liquids?
What plastics are safe for hot liquids? Plastics #5 Polypropylene (PP) is considered to be the safest of all plastics, this is a robust plastic that is heat resistant. Because of its high heat tolerance, Polypropylene is unlikely to leach even when exposed to warm or hot water. This plastic is approved for use with […]
Is digesting food a physical or chemical change?
Is digesting food a physical or chemical change? Food is broken into smaller parts and mixes continually with enzymes and other gastric juices. Mechanical digestion occurs in the mouth, stomach, and small intestine. Food is chemically changed in digestion when new, smaller substances are formed. These chemical changes are examples of chemical digestion. What is […]
Which is better PV or CSP?
Which is better PV or CSP? Both CSP and PV have their own pros and cons. In terms of energy storage and efficiency, CSP is superior since it can store energy with the help of TES technologies. PV, on the other hand, is incapable of producing or storing thermal energy since they directly generate electricity. […]
What happens to temperature when air pressure decreases?
What happens to temperature when air pressure decreases? For example, when the pressure increases then the temperature also increases. When the pressure decreases, then the temperature decreases. Because there is less mass in the can with a constant volume, the pressure will decrease. This pressure decrease in the can results in a temperature decrease. Why […]
Will vinegar turn pennies green?
Will vinegar turn pennies green? When you add vinegar and salt to pennies, it dissolves the top copper-oxide layer of the penny. This causes the copper atoms to mix with oxygen in the air and chlorine in the salt. This creates a blue-green substance known as malachite. What is the green stuff on pennies called? […]