Is fracking good or bad? In the U.S. alone, around 13 million metric tons of methane is released annually from natural gas wells alone. Fracking well sites are the source of a number of other air pollutants, which are less common than methane, but arguably more harmful to local populations. Where is fracking banned? Four […]
What is loss formula?
Why diesel engines are called CI engines?
Why diesel engines are called CI engines? Diesel engines are sometimes called compression-ignition engines because initiation of combustion relies on air heated by compression rather than on an electric spark. In a diesel engine, fuel is introduced as the piston approaches the top dead centre of its stroke. What is the difference between SI & […]
What are the disadvantages of using aluminum wire?
What are the disadvantages of using aluminum wire? The disadvantage of aluminum wiring is that it must be installed correctly to avoid the risk of house fires. When a current runs through aluminum wiring it causes the metal to expand. This creates a cycle of expanding and contracting called “cold creep.” In time, this can […]
Which can show resonance?
Which can show resonance? Resonance is shown by toluene which contains alternate single and double bonds in a planar six-membered ring. Was this answer helpful? Why is ozone a resonance structure? Ozone, or O3 , has two major resonance structures that contribute equally to the overall hybrid structure of the molecule. Both structures account for […]
Could 8.8 cm 8.0 cm and 8.8 cm be the side lengths of a triangle?
What does the double ended arrow indicate in the following chemical equation?
What does the double ended arrow indicate in the following chemical equation? The double-ended arrow in the chemical equation indicates a reversible reaction. A reversible reaction is a reaction in which the conversion of reactants into products and the conversion of products into reactants can happen simultaneously. What does the arrow in a chemical reaction […]
What is the net external force on an object in free fall?
What do you mean by cost efficiency?
What do you mean by cost efficiency? As explained in the example above, cost-efficiency is a type of business efficiency strategy. Simply put, it is the act of saving money by making a product or performing an activity in a better way. Businesses measure cost-efficiency by monitoring the ratio of the output produced to the […]
Why are objects Coloured?
Why are objects Coloured? Objects appear different colours because they absorb some colours (wavelengths) and reflected or transmit other colours. The colours we see are the wavelengths that are reflected or transmitted. White objects appear white because they reflect all colours. Black objects absorb all colours so no light is reflected. Why is red the […]