Category: Physics

How does air resistance affect cars? Air friction does not significantly affect a car’s gas mileage. Cars are slowed down when they stir up the air too much. Stirring up the air creates vortices and billows that take energy away from the car. This effect is known as “wake drag”, “pressure drag”, or “form drag”. […]

Can a chemical change be reversed? A chemical change occurs whenever matter changes into an entirely different substance with different chemical properties. Because chemical changes result in different substances, they often cannot be undone. What is a chemical change that Cannot be reversed? Burning is a non-reversible chemical change. When you burn wood, the carbon […]

Why the Colour of shadow is always black? Shadows most often appear black because the visible light cannot make its way past the obstruction, if there is no light falling on an object then it will be black as there is no light to reflect. As to why black is the absence of light, it […]

Is a survey a secondary source? Primary sources are the original documents of an event or discovery such as results of research, experiments or surveys, interviews, letters, diaries, legal documents, and scientific journal articles. diaries and letters. academic articles reporting NEW data and findings. What is secondary data analysis examples? They might search through periodicals, […]

Is a type of construction where the main load-bearing? Explanation; Suspension is a type of construction where the main load-bearing elements are hung from suspension cables that are then suspended from vertical supports anchored into the ground or a riverbed. How is a suspension construction made where is it most commonly used? How is a […]

What is the darkest phase of the moon? The moment a thin sliver of the Moon becomes visible after New Moon is the beginning of the first intermediate phase, the Waxing Crescent Moon. In the past, this used to be called New Moon while the darkest phase was called Dark Moon. How long does the […]

How do you tell if the tide is coming in or out? You can tell if the tide is coming in or out by reading a local tide table since they list the predicted times that the tide will be highest and lowest. In the time that the tide shifts from its lowest point to […]

What will happen to the pressure of a contained gas if its temperature is lowered? How does a decrease in temperature affect the pressure of a contained gas? The pressure decreases because the kinetic energy decreases with the temperature and slower moving particles impact the walls of a contain with less energy. Which three factors […]

What is the electron group geometry of cl2o? Structure. The structure of dichlorine monoxide is similar to that of water and hypochlorous acid, with the molecule adopting a bent molecular geometry (due to the lone pairs on the oxygen) and resulting in C2V molecular symmetry. How many electron groups are in SF2? Each bond uses […]

What are some examples of decomposers? Examples of Decomposers in Terrestrial Ecosystems Beetle: type of shredder that eats and digests detritus. Earthworm: type of shredder that eats and digests detritus. Millipede: type of shredder that eats and digests detritus. Mushroom: type of fungi that grows out of the ground or the dead material it’s feeding […]