What does tightening a string do? Tension refers to how tightly the string is stretched. Tightening the string gives it a higher frequency while loosening it lowers the frequency. When string players tighten or loosen their strings, they are altering the pitches to make them in tune. The density of a string will also affect […]
Is Q A joule or kilojoule?
At what altitude is 0 gravity?
At what altitude is 0 gravity? Near the surface of the Earth (sea level), gravity decreases with height such that linear extrapolation would give zero gravity at a height of one half of the Earth’s radius – (9.8 m·s−2 per 3,200 km.) Which force is always attractive in nature? gravitational force Why gravity is not […]
How do you explain combustion?
How do you explain combustion? Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually […]
What are the 3 basic types of scaffolds in the construction industry?
What are the 3 basic types of scaffolds in the construction industry? Workers who use scaffolds can be divided into three groups: Suspended Scaffolds. Supported Scaffolds. Aerial Lifts. What is the narrowest scaffolding? Narrowest 600mm scaffold tower For our narrowest tower try the stair tower. It comes in a 600mm wide frame so it can […]
What does velocity relative to the ground mean?
What does velocity relative to the ground mean? The velocity of the object measured relative to the ground is called the ground speed. Again, this is a vector quantity. Airspeed is the vector difference between the ground speed and the wind speed. On a perfectly still day, the airspeed is equal to the ground speed. […]
What is a quasi experiment example?
What is a quasi experiment example? This is the most common type of quasi-experimental design. Example: Nonequivalent groups design You hypothesize that a new after-school program will lead to higher grades. You choose two similar groups of children who attend different schools, one of which implements the new program while the other does not. Why […]
Why is Shield 2p better than 2s?
Why is Shield 2p better than 2s? 2p has higher energy level because the negatively charged electron experiences less of an effective nuclear charge than the 2s electron. What happens to shielding when you go down a group? Down a group, the number of energy levels (n) increases, and so does the distance between the […]
What is hydraulic principle?
What is hydraulic principle? The basic principle behind any hydraulic system is very simple – pressure applied anywhere to a body of fluid causes a force to be transmitted equally in all directions, with the force acting at right angles to any surface in contact with the fluid. This is known as Pascal’s Law. What […]
What is the structure and function of biomolecules?
What is the structure and function of biomolecules? Biomolecule, also called biological molecule, any of numerous substances that are produced by cells and living organisms. Biomolecules have a wide range of sizes and structures and perform a vast array of functions. The four major types of biomolecules are carbohydrates, lipids, nucleic acids, and proteins. What […]