Is forced hot air unhealthy? The biggest downside of using a forced air heating system is that it leaves you vulnerable to inefficiency stemming from ductwork problems. If your ductwork is well-designed, expertly installed, and kept in prime condition, then you’ll be able to heat your home quite efficiently. Is forced air heating cheaper? Other […]
When two or more solid substances are mixed together they liquefy is called?
When two or more solid substances are mixed together they liquefy is called? In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities are retained […]
How is energy transferred from one object to another?
How is energy transferred from one object to another? The two ways that energy can be transferred are by doing work and by heat transfer. Can an object have work? In the physics sense, work is never something an object has. It is only something that one object does to another. Work changes the amount […]
What are the 3 major layers of the geosphere?
What are the 3 major layers of the geosphere? The Earth’s geosphere is divided into three chemical sections: The crust, composed almost entirely of light elements, like silicon. The mantle, which is 68% of the Earth’s mass. The core, the innermost layer; it is composed of very dense elements, such as nickel and iron. What […]
What was the first drum set ever made?
What was the first drum set ever made? MCCABE: The earliest surviving examples of drums date back to the 6th century B.C. But the drum set as we know it today is only 100 years old. In 1918, the Chicago-based Ludwig Drum Company debuted the Jazz-Er-Up, an all-in-one set with a single-bass drum and pedal, […]
What are the three components of an electrical circuit?
What are the three components of an electrical circuit? Electric circuits An electric circuit has three parts: An energy source – like a battery or mains power. An energy receiver – like a lightbulb. An energy pathway – like a wire. Why you should not waste electricity? We should not waste electricity because it is […]
How many homes can 1 GW power?
What is all matter made up of?
What is all matter made up of? Explain that all matter on Earth exists in the form of a solid, liquid, or gas, and that solids, liquids, and gases are all made of extremely tiny particles called atoms and molecules. Tell students that an atom is the smallest building block of matter and a molecule […]
What part of the retina is responsible for the sharpest vision?
What part of the retina is responsible for the sharpest vision? In the middle of the retina is a small dimple called the fovea or fovea centralis. It is the center of the eye’s sharpest vision and the location of most color perception. What part of the retina is most sensitive to light? fovea centralis […]
Which is the least reactive metal?
Which is the least reactive metal? Silver, gold, and platinum are metals with the least reactivity. They are found in nature. Which is a very reactive metal? Caesium Which is more reactive platinum or gold? The more reactive the metal, the more rapid the reaction is. Platinum is placed below gold in the reactivity series. […]