Category: Engineering

Which US city is nicknamed the Mile High City because of its height above sea level? Denver Is Denver at a higher altitude? Denver is situated at a high altitude of 5,280 feet (one mile high) above sea level. Visitors from lower elevations often underestimate the effects of altitude on their health and physical abilities. […]

How do you find the final temperature of a water mixture? Calculate the final temperature of the water mixture using the equation T(final) = (m1_T1 + m2_T2) / (m1 + m2), where m1 and m2 are the weights of the water in the first and second containers, T1 is the temperature of the water in […]

How do you calculate flow velocity in a pipe? Figure 1. Flow rate is the volume of fluid per unit time flowing past a point through the area A. Here the shaded cylinder of fluid flows past point P in a uniform pipe in time t. The volume of the cylinder is Ad and the […]

What is the function of a shock absorber? The role of the shock absorber is to keep the car’s tyres in permanent contact with the road, helping to provide optimum grip, when cornering and braking. Shock absorbers are part of the suspension, so if the shocks are worn, the vehicle’s ride and comfort is compromised. […]

What are two important quantum mechanical concepts associated with the Bohr model of the atom? 2.4 (a) Two important quantum-mechanical concepts associated with the Bohr model of the atom are that electrons are particles moving in discrete orbitals, and electron energy is quantized into shells. How are the quantum mechanical model and the Bohr model […]

What is the position of Fermi level in intrinsic semiconductor? In intrinsic semiconductor, the number of holes in valence band is equal to the number of electrons in the conduction band. Hence, the probability of occupation of energy levels in conduction band and valence band are equal. Therefore, the Fermi level for the intrinsic semiconductor […]

What is coordination number and atomic packing factor? It is defined as the ratio of volume occupied by atoms in unit cell to the volume of the unit cell. If the number of atoms per unit cell are n and if V a is the volume of atoms in the unit cell and V is […]

What is draft in molding? In engineering, draft is the amount of taper for molded or cast parts perpendicular to the parting line. By tapering the sides of the mold by an appropriate “draft angle”, for instance 2° (two degrees), the mold will be easier to remove. How do you calculate draft angle? When designing […]

What is max principal stress? Maximum principal stress theory: This theory states that failure in any material occurs when the principal stress in that material due to any loading exceeds the principal stress at which failure occurs in the 1 dimensional loading test (universal tensile test in case of mild steel). Why are principal stresses […]

Who was arrested for refusing to give up a seat on the bus and why is this significant? The boycott took place from December 5, 1955, to December 20, 1956, and is regarded as the first large-scale U.S. demonstration against segregation. Four days before the boycott began, Rosa Parks, an African American woman, was arrested […]