What is the difference between 1018 and 4140 steel? 1018 is standard cold rolled steel it is soft. Usually rated in Rockwell B or Brinell hardness scale. I once threw a piece in the hardness tester and I believe it came up -20 Rc on the other hand 4140 HT is an alloy steel and […]
How does diffusion coefficient change with temperature?
How does diffusion coefficient change with temperature? We note also that the diffusion coefficient increases strongly with the temperature of contact. The coefficient of diffusion increases gradually as the temperature of the air increases. The activation energy was calculated by using the Arrhenius equation for all simulators. Why diffusion coefficients of carbon in bcc and […]
How do facilitators ensure that a group works together effectively?
How do facilitators ensure that a group works together effectively? Answer: They organize the way a group meeting will run. They guide discussion so that everyone contributes equally. They resolve conflicts and make sure all opinions are heard. Which actions should be taken at the groups first meeting to ensure an effective project? Which actions […]
How does a double wishbone suspension work?
How does a double wishbone suspension work? How does double wishbone suspension work? Double wishbone suspension allows each wheel to act and react independently from the others. It achieves this thanks to two wishbone-shaped arms (also known as control arms or double A-arms) that are located between the knuckle on the wheel assembly and the […]
What safety factor should you perform before enter a curve or sharp turn?
What safety factor should you perform before enter a curve or sharp turn? Centrifugal force results in strong outward pull on your vehicle. So what you need to do before entering a curve is slow down. Lowering your speed when you’re already on a curve may cause your car to skid. Look for signs indicating […]
Why are water towers elevated?
Why are water towers elevated? The primary function of water towers is to pressurize water for distribution. Elevating the water high above the pipes that distribute it throughout the surrounding building or community ensures that hydrostatic pressure, driven by gravity, forces the water down and through the system. Where do cities put their water towers? […]
What variables affect the efficiency of a heat engine?
What variables affect the efficiency of a heat engine? The thermal efficiency of a heat engine is expressed as a product of the Carnot efficiency, the external irreversibility factor and the internal irreversibility factor, by which the three factors that affect the thermal efficiency can be clearly distinguished, and the influences of the external and […]
What is ferrous alloy?
What is ferrous alloy? Ferrous alloys or metals are metals that consist mostly of iron (Fe). Steel is an iron-based alloy containing typically less than 1% carbon, where iron frequently contains 2% or more carbon. Is brass an alloy? Brass, alloy of copper and zinc, of historical and enduring importance because of its hardness and […]
How do you identify an antecedent?
When the angle between surface tension with the liquid θ is greater than 90 degree the liquid becomes?
When the angle between surface tension with the liquid θ is greater than 90 degree the liquid becomes? If θ is obtuse, i.e; θ >90°, then liquid meniscus will be convex upwards. If angle of contact is acute angle, i.e; θ <90°, then liquid will wet the surface. When there is a capillary depression What […]