Category: Engineering

Which gas has highest diffusion rate? Diffusion is inversely proportional to molecular weight. Therefore, NH3 has the highest diffusion rate. Which noble gas diffuses the fastest? Neon Why rate of diffusion is faster in gases? Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their […]

What is filter in circuit theory? A filter is a circuit whose transfer function, that is the ratio of its output to its input, depends upon frequency. There are three broad categories of filter which are widely used: Low-pass filters allow any input at a frequency below a characteristic frequency to pass to its output […]

What is Big O notation with example? Big O notation shows the number of operations Big O notation Example algorithm O(log n) Binary search O(n) Simple search O(n * log n) Quicksort O(n2) Selection sort How is Big O notation used to describe the complexity of algorithms? Big O notation is used in Computer Science […]

What caused the Columbia accident? The cause of the accident was a piece of foam that had fallen off the Shuttle’s external fuel tank during launch. The foam struck the left wing of the shuttle, causing serious damage that ultimately led the vehicle to disintegrate when it reentered Earth’s atmosphere. What went wrong in the […]

What is the most widely used arc welding process in the world? Gas Metal Arc Welding (GMAW/MIG) This style of welding is also referred to as Metal Inert Gas (MIG). It uses a shielding gas along the wire electrode, which heats up the two metals to be joined. This method requires a constant voltage and […]

What are the parts of a number called? called the decimal point. The digits lying to the left of the decimal point form the whole number part. The decimal point together with the digits lying on the right of decimal point form the decimal part. How do you find the part of a number? Divide […]

What is the meaning of shear stress? Shear stress, force tending to cause deformation of a material by slippage along a plane or planes parallel to the imposed stress. The resultant shear is of great importance in nature, being intimately related to the downslope movement of earth materials and to earthquakes. Is shear stress a […]

What happens if brake rotors are too thin? When a rotor is too thin, it overheats and warps, leading to an annoying vibration or pedal pulsation. When rotors were thicker, they could take the wear from the brake pads, be machined and still have enough metal left to dissipate the heat. What causes brake rotors […]

How are density and specific gravity related? specific gravity: Relationship Between Specific Gravity and Density. If the densities of the substance of interest and the reference substance are known in the same units (e.g., both in g/cm3 or lb/ft3), then the specific gravity of the substance is equal to its density divided by that of […]

What does changing wheel offset do? Changing the offset on a front wheel drive vehicle changes the scrub radius, steering, acceleration and braking. On the other hand, frequently you find rear wheel drive vehicles have a negative offset. Changing the offset changes the scrub radius and how the vehicle steers. What happens if the wheel […]