What distinguishes an electromagnet from a permanent magnet? Permanent Magnets and Electromagnets: What are the Differences? A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes […]
Which US city is nicknamed the Mile High City because of its height above sea level?
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. […]
What is the equivalent of 85 decibels?
What is the equivalent of 85 decibels? Topic Overview Noise Average decibels (dB) Vacuum cleaner, average radio 75 Heavy traffic, window air conditioner, noisy restaurant, power lawn mower 80–89 (sounds above 85 dB are harmful) Subway, shouted conversation 90–95 Boom box, ATV, motorcycle 96–100 What’s the loudest sound on earth? The Krakatoa volcanic eruption: Not […]
How do you calculate flow velocity in a pipe?
What is the function of a shock absorber?
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?
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?
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?
What is draft in molding?
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?
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 […]