Category: Physics

Why is water solubility important to life? Water is called the “universal solvent” because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, […]

Why does the inner core of Earth remain solid even though it is very hot? The inner core is solid because it is made of very dense, or heavy, materials – like iron and nickel. Even though it is very hot, these materials don’t “melt” very easily, so they stay solid. Answer 3: It turns […]

What is the purpose of the iodine clock reaction? The “clock reaction” is a reaction famous for its dramatic colorless-to-blue color change, and is often used in chemistry courses to explore the rate at which reactions take place. The color change occurs when I2 reacts with starch to form a dark blue iodine/starch complex. Why […]

What happens to unused energy in the body? Excess protein that’s not needed to build and maintain your body or to meet energy demands is also changed into fat and stored. The unused calories from dietary fat and alcohol also are converted into body fat. Body fat, then, is the stored form of excess calories […]

What are 3 examples of an unlimited form of government? Examples of unlimited governments include authoritarian, like Iran, and totalitarian regimes, like North Korea. Which is the best description of an unlimited government? Unlimited Government: Control is placed entirely in the leader’s hands and his/her appointees. No limit is placed on the leader’s power. Government […]

Is it better to wear reading glasses or not? Whether or not you choose to wear your reading glasses will make no difference to your eyesight in the long run (although if you have to strain your eyes to read, you might get headaches or find that your eyes feel sore). Are cheap reading glasses […]

How do you enter a different state of consciousness? Altered states of consciousness may also be induced by: Hypnosis. Meditation. Spiritual experience. Learning. Insight. Understanding. Emotional development. Sensitivity training. What is a normal state of consciousness? Definition. The normal state of consciousness comprises either the state of wakefulness, awareness, or alertness in which most human […]

Where do plants get the energy to grow? Plants need energy from the sun, water from the soil, and carbon from the air to grow. Air is mostly made of nitrogen, oxygen, and carbon dioxide. Where does the mass of plants come from? The mass of a tree is primarily carbon. The carbon comes from […]

Does Cl and Br form ionic bonds? Both Chlorine and Bromine have 7 electrons in their outer shell and form ions by gaining one electron. ,So Chlorine becomes Cl- and Bromine becomes Br-. As these ions are both negative they repel each other and do not form an Ionic compound. Is Sugar ionic? Sugar is […]

What is the most economical central heating system? For most of us, the cheapest heating system is going to be mains gas fuelled. If you’re living off the grid, LPG is the most cost effective heating option. If you take full advantage of Economy 7 electricity tariffs, you may be able to match LPG systems […]