Is biofuels better than fossil fuel? The main benefit of biofuels over fossil fuels is that burning them puts less of the greenhouse gas, carbon dioxide, into the atmosphere. The carbon is constantly recycled and if the plants were not used as fuel they would be eaten by animals and the carbon dioxide would then […]
Which gas is used in GC?
Which gas is used in GC? Carrier gases in gas chromatography are used to move the solutes through the column. Helium, hydrogen and nitrogen are the most widely used gases. Nitrogen provides the best efficiency but is extremely slow. Helium provides good efficiency and analysis times but is an expensive choice for a carrier gas. […]
How do you tell if a tree branch is strong enough for a swing?
What is a controlled variable in science?
What is a controlled variable in science? A control variable is anything that is held constant or limited in a research study. It’s a variable that is not of interest to the study’s aims, but is controlled because it could influence the outcomes. What does control mean in science examples? A scientific control is an […]
What are the two main factors of tectonic plates movement?
What are the two main factors of tectonic plates movement? The forces that drive Plate Tectonics include: Convection in the Mantle (heat driven) Ridge push (gravitational force at the spreading ridges) Slab pull (gravitational force in subduction zones) What new information led to the theory of plate tectonics? When the concept of seafloor spreading came […]
What happens when the width of the slit is increased?
What happens when the width of the slit is increased? If the width of the slit is increased in diffraction most of the light will pass through the slit without getting diffracted. As a result, the overlap because of diffraction reduces and lesser and narrower fringes are formed. Does frequency affect diffraction? High frequency sounds, […]
What is the best angle for a propeller?
What is the best angle for a propeller? around 2 to 4 degrees What is the greatest force on a propeller? Centrifugal force is a physical force that tends to throw the rotating propeller blades away from the hub. This is the most dominant force on the propeller. Torque bending force, in the form of […]
What is Coriolis effect and how does it affect weather?
What is Coriolis effect and how does it affect weather? Outside storm systems, the impact of the Coriolis effect helps define regular wind patterns around the globe. As warm air rises near the Equator, for instance, it flows toward the poles. In the Northern Hemisphere, these warm air currents are deflected to the right (east) […]
Which is more elastic veins or arteries?
Which is more elastic veins or arteries? In arteries, the tunica media, which contains smooth muscle cells and elastic tissue, is thicker than that of veins so it can modulate vessel caliber and thus control and maintain blood pressure. Larger arteries are typically elastic and smaller arteries are more likely to be muscular. What are […]