What are some examples of physical and chemical properties? Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change. What are the physical properties of materials? A material’s physical properties denote the physical state of materials that are exclusive […]
Which salt is more soluble in acidic solution?
Which salt is more soluble in acidic solution? For CuBr adding H+ forms HBr and that is a weak acid; therefore, CuBr is more soluble in acid than in water. Is AgCl more soluble in acid than water? AgCl will be more soluble in acidic solutions because Cl- will react with basic solutions because HCl […]
Which US president served 3 terms?
Which US president served 3 terms? Roosevelt won a third term by defeating Republican nominee Wendell Willkie in the 1940 United States presidential election. He remains the only president to serve for more than two terms. What was the name of Franklin Roosevelt’s foreign policy? The main foreign policy initiative of Roosevelt’s first term was […]
Why is fluorine-18 unstable?
Why is fluorine-18 unstable? Fluorine-18 Of the unstable nuclides of fluorine, 18F has the longest half-life, 109.739 minutes. It has two decay modes, of which the main one is positron emission. For this reason 18F is a commercially important source of positrons. Like all positron-emitting radioisotopes, 18F also may decay by electron capture. Why is […]
When should I use planetary gears?
When should I use planetary gears? Generally, planetary gears are used as speed reducers. They are used to slow down motors and increase the torque. Torque is the working power of the machine. But we’ve seen our planetary gears turned around to be used as speed increasers, too. Why do automatic transmissions use planetary gears? […]
How can we increase calcium in our body?
How can we increase calcium in our body? Good sources of calcium include: milk, cheese and other dairy foods. green leafy vegetables, such as broccoli, cabbage and okra, but not spinach. soya beans. tofu. soya drinks with added calcium. nuts. bread and anything made with fortified flour. fish where you eat the bones, such as […]
When was the 25th Amendment used?
When was the 25th Amendment used? Congress approved the 25th Amendment on July 6, 1965. The states completed ratification by February 10, 1967, and President Lyndon Johnson certified the amendment on February 23, 1967. The first use of the 25th Amendment occurred in 1973 when President Richard Nixon nominated Congressman Gerald R. Is designated survivor […]
Why does it occur when the brakes are applied suddenly?
Why does it occur when the brakes are applied suddenly? Answer: It is due to inertia of motion. When the driver of a fast moving car suddenly applies brakes the passengers in the car? When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained […]
How do I lower my condenser pressure?
How do I lower my condenser pressure? 9.14 Condenser pressure regulators With air-cooled condensers and water-cooling towers it is possible to reduce the air flow by automatic dampers, fan speed control or switching off fans, where two or more are fitted. The control should work from pressure but can be made to work from temperature. […]
What is the use of manganese nodules?
What is the use of manganese nodules? It occurs in many minerals such as manganite, sugilite, purpurite, rhodonite, rhodochrosite, and pyrolusite. It is also found in many mineraloids such as psilomelane and wad. Steel Mills Use Manganese: The most important use of manganese is in the manufacturing of steel. Why are manganese nodules so valuable? […]