Why only Tungsten is used in bulb? Tungsten is used for making filament of an electric bulb due to the following reasons: Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp glows at high temperatures. What is the […]
What should manifold absolute pressure be at idle?
What should manifold absolute pressure be at idle? The vacuum inside an engine’s intake manifold, by comparison, can range from zero up to 22 inches Hg or more depending on operating conditions. Vacuum at idle is always high and typically ranges from 16 to 20 inches Hg in most vehicles. What PSI should a MAP […]
Why is healthcare an imperfect market?
Why is healthcare an imperfect market? The market for health-care services is considered an imperfect market because — 1)Health care is a heterogeneous product, as the patient can experience a range of outcomes; 2) Patients who are insured have third-party payers covering their direct medical expenses; and 3) A “market price” is lacking, i.e., no […]
What is the direction of the magnetic lines of force?
What is the direction of the magnetic lines of force? Lines of force always form individual CLOSED LOOPS around the magnet. Lines of force have a definite DIRECTION from North to South. Lines of force that are close together indicate a STRONG magnetic field. Is a magnet made with iron nickel or cobalt? There is […]
What is the most frequently cited cause of multiple vehicle crashes?
What is the most frequently cited cause of multiple vehicle crashes? In fact, the National Highway Transportation Safety Administration (NHTSA) reports more than one out of four of all traffic fatalities and almost 17 percent of all fatal crashes in 2017 resulted from speeding. When a traffic collision does not lead to death, the most […]
What does the coefficient of static friction depend on?
What does the coefficient of static friction depend on? Already Coulomb presented experimental evidence that the static coefficient of friction may depend on time, on normal force, on the contact size, on the nature of contacting materials, and on the presence of intermediate lubricant layers. What is the static coefficient of friction? The coefficient of […]
What is good miles per gallon?
What is good miles per gallon? Don’t expect to attain higher than 20 mpg overall with a non-hybrid, and most offer less than 30 mpg on the highway. The best fuel-efficient non-electric vehicles get the following EPA-estimated combined numbers: Small Pickup: Chevrolet Colorado 2WD Diesel and GMC Canyon 2WD Diesel get 23 mpg. How much […]
What is the density triangle?
What is the density triangle? The triangle is divided into three parts, with density occupying the top portion and mass and volume occupying the bottom two portions. The positions of each element of the triangle show us how they relate to one another through the formula above (Density = Mass / Volume, or ρ = […]
When discussing engines What is the ratio of output?
When discussing engines What is the ratio of output? When discussing engines, the ratio of output work to input work expressed as a percentage is called . Efficiency η is the ratio of input work over the output work. It is defined as: η=work done/heat absorbed=(Q₂-Q₁)/Q₁where Q₁ is the heat absorbed and Q₂-Q₁ is the […]
Should I charge my new phone overnight?
Should I charge my new phone overnight? “Do not leave your phone connected to the charger for long periods of time or overnight.” Huawei says, “Keeping your battery level as close to the middle (30% to 70%) as possible can effectively prolong the battery life.” The official word is to keep your phone charged – […]