How does ice hockey speed up friction? During the sharpening process, the surface area of the skates is reduced, thus reducing the amount of metal that is making contact with the ice. Reducing the surface area by sharpening your skates reduces friction and increases speed. This additional speed comes in handy when you propel yourself […]
What are fuses used in?
What are fuses used in? What is a Fuse? Fuses are sacrificial devices used to protect much more expensive electrical components from the damaging effects of overcurrent. They consist of a low-resistance metal or wire that is used to close a circuit. Are fuses still used? Over 100 years later, fuses are still used to […]
What is meant by laws of motion?
Is it dark during solar eclipse?
Which type of power plant is best?
Which type of power plant is best? Hydroelectric power plants. Hydroelectric power plants are one of the most effective and eco-friendliest of all power plants. Nuclear power plants. Nuclear power stations also top the list of power plants that can produce massive amounts of energy. Coal-run power plants. Where was the first power plant? Pearl […]
What happens to a dead star?
What happens to a dead star? Stars die because they exhaust their nuclear fuel. Once there is no fuel left, the star collapses and the outer layers explode as a ‘supernova’. What’s left over after a supernova explosion is a ‘neutron star’ – the collapsed core of the star – or, if there’s sufficient mass, […]
How does a streams gradient affect its velocity?
How does a streams gradient affect its velocity? Gradient is usually expressed in feet per mile of meters per kilometer. Gradient looks at how far the water drops over the distance the water actually flows. The gradient influences the velocity of the stream. The steeper the gradient, the higher will be the velocity if all […]
Why do black bodies radiate?
Why do black bodies radiate? A black body is an idealized object that absorbs all electromagnetic radiation it comes in contact with. It then emits thermal radiation in a continuous spectrum according to its temperature. Much cooler objects like planets and humans emit the most radiation in the infrared. Can radiation travel through a vacuum? […]
What did Darwin say about finches?
What did Darwin say about finches? Darwin noticed that fruit-eating finches had parrot-like beaks, and that finches that ate insects had narrow, prying beaks. He wrote: “One might really fancy that from an original paucity [scarcity] of birds one species had been taken and modified for different ends.” Why is Daphne Major such a good […]
What is another name for straight line motion?
What is another name for straight line motion? The linear motion, also called the Rectilinear Motion can be of two types: Uniform linear motion with constant velocity or zero acceleration. What is type of motion? In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating. […]