What are the examples of convex mirror? Concave mirror v/s convex mirror – result Concave mirror Convex Mirror The examples of concave mirrors are the mirrors used in automobile head lights, reflecting telescopes, torch lights, etc. The examples of convex mirrors are the mirrors used as rear side mirrors of vehicles, optical instruments, calling bell, […]
Why does light take shortest path?
Why does light take shortest path? Light does travel on the path which would take the shortest time to travel between two points. This nature of light best explains the refraction of light when traveling across two mediums of different refractive index. Light does travel on the path which would take the shortest time to […]
In which of the following number all zeros are significant?
In which of the following number all zeros are significant? Therefore, in 20.000, all zeros are significant. Do zeros count as decimal places? Leading zeros (zeros before non-zero numbers) are not significant. For example, 0.00052 has two significant figures: 5 and 2. Trailing zeros in a number containing a decimal point are significant. For example, […]
Which part of plant helps in gas exchange?
Which part of plant helps in gas exchange? stomata How does gas exchange work in plants? Plants obtain the gases they need through their leaves. The gases diffuse into the intercellular spaces of the leaf through pores, which are normally on the underside of the leaf – stomata. From these spaces they will diffuse into […]
What disorder means?
What disorder means? Disorder – An illness that disrupts normal physical or mental functions. Oxford English Dictionary. A disorder could be defined as a set of problems, which result in causing significant difficulty, distress, impairment and/or suffering in a person’s daily life. What is an example of disorder? Examples include antisocial personality disorder, obsessive-compulsive personality […]
How do we determine the conditions that existed in the early universe quizlet?
How do we determine the conditions that existed in the early universe quizlet? How do we determine the conditions that existed in the very early universe? We work backward from current conditions to calculate what temperatures and densities must have been when the observable universe was much smaller in size. Why can’t Current theories describe […]
What are the differences between covalent and ionic bonds?
What are the differences between covalent and ionic bonds? The two main types of chemical bonds are ionic and covalent bonds. An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms. The only pure covalent bonds occur between […]
What is mechanical efficiency is the ratio of?
What is mechanical efficiency is the ratio of? Mechanical efficiency, measure of the effectiveness with which a mechanical system performs. It is usually the ratio of the power delivered by a mechanical system to the power supplied to it, and, because of friction, this efficiency is always less than one. What causes low volumetric efficiency? […]
Which of the following intermolecular forces is the strongest?
Which of the following intermolecular forces is the strongest? Ion-dipole forces What kinds of forces hold ionic solids together quizlet? What forces hold ionic solids together? Ionic bonds because ionic bonds are much stronger than any intermolecular forces. Ionic solids tend to have: Much higher melting points than molecular solids. What kind of force is […]
Why are energy transfers not 100% efficient?
Why are energy transfers not 100% efficient? The second law explains why energy transfers are never 100% efficient. Because ecological efficiency is so low, each trophic level has a successively smaller energy pool from which it can withdraw energy. This is why food webs have no more than four to five trophic levels. How can […]