Category: Physics

What 3 types of EM waves are dangerous to humans? The most dangerous frequencies of electromagnetic energy are X-rays, gamma rays, ultraviolet light and microwaves. X-rays, gamma rays and UV light can damage living tissues, and microwaves can cook them. How long does it take for gamma rays to kill you? Most deaths occur within […]

What are the possible values of n and ML for an electron in a 4 d orbital? What are the possible values of n and ml for an electron in a 4d orbital? n = 4 and ml = -2, -1, 0, +1, +2. How many orbitals are in 5f? seven How many orbitals are […]

What phase are cells in when they are not dividing? Interphase What happens if a cell does not divide? It is important for cells to divide so you can grow and so your cuts heal. It is also important for cells to stop dividing at the right time. If a cell can not stop dividing […]

What causes resistance in a wire? The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through. […]

Why did US not join League of Nations? The League of Nations was established at the end of World War I as an international peacekeeping organization. Although US President Woodrow Wilson was an enthusiastic proponent of the League, the United States did not officially join the League of Nations due to opposition from isolationists in […]

How do you solve Vo? To find the voltage at Vo, start at either end and add or subtract the voltage drop across the resistor. If we start at the 10V end: Vo = 10 – 3.58 = 6.42 V. If we start at the -2V end: Vo = -2 + 8.42 = 6.42 V. […]

Do astronomers use chemistry? By comparing astronomical observations with laboratory measurements, astrochemists can infer the elemental abundances, chemical composition, and temperatures of stars and interstellar clouds. Do you need chemistry for astronomy? Astronomy is a unique subject because it deals with such a vast mixture of topics – the very reason why many people find […]

What are the 3 field forces? Field forces are also called noncontact forces or at-a-distance forces. There are four types of field forces: gravity, electromagnetic forces, and the strong force and the weak force found in atoms. What are two field forces examples? Examples of force fields include magnetic fields, gravitational fields, and electrical fields. […]

What are 2 facts about the troposphere? Fact Sheet The troposphere contains 75% of the atmosphere’s total mass. In either space or time the troposphere is not constant. Weather occurs in the troposphere. The troposphere is 10 miles from the equator. The troposphere is 5-7 miles above the poles. Does not contain ozone. Why do […]

How did Joseph save Egypt? Joseph collected all the food produced in those seven years of abundance in Egypt and stored it in the cities. When all Egypt began to feel the famine, the people cried to Pharaoh for food. Then Pharaoh told all the Egyptians, “Go to Joseph and do what he tells you.” […]