What do the rows mean on a periodic table? Each row represents one period; the period number of an element indicates how many of its energy levels house electrons. Sodium, for instance, sits in the third period, which means a sodium atom typically has electrons in the first three energy levels. How do you identify […]
Why is the Cenozoic Era important?
Why is the Cenozoic Era important? Cenozoic Era, third of the major eras of Earth’s history, beginning about 66 million years ago and extending to the present. It was the interval of time during which the continents assumed their modern configuration and geographic positions and during which Earth’s flora and fauna evolved toward those of […]
What is the difference between average acceleration and instantaneous acceleration?
What is the difference between average acceleration and instantaneous acceleration? Average acceleration is the change of velocity over a period of time. Instantaneous acceleration is the change of velocity over an instance of time. What’s the definition of instantaneous speed? Definition: When the speed of an object is constantly changing, the instantaneous speed is the […]
What charge do humans have?
What charge do humans have? Resting cells are negatively charged on the inside, while the outside environment is more positively charged. This is due to a slight imbalance between positive and negative ions inside and outside the cell. Cells can achieve this charge separation by allowing charged ions to flow in and out through the […]
Is PCl3 covalent or ionic?
Is PCl3 covalent or ionic? PCl3 has distorted structure due to the presence of lone pairs of electrons. (A) PCl3 Is contains three covalent bond which are formed by equal sharing of electron in between phosphorus atom and chlorine atom, hence it’s a covalent molecule. Does PCl3 contain ionic bonds? Phosphorus trichloride. Covalent bonding. Strong […]
Who is father of nutrition?
Who is father of nutrition? Antoine Lavoisier Who is the first nutritionist? Adelle Davis (25 February 1904 – 31 May 1974) was an American author and nutritionist, considered “the most famous nutritionist in the early to mid-20th century.” She was as an advocate for improved health through better nutrition…. Adelle Davis Website The Adelle Davis […]
What comes first in trace conditioning?
What comes first in trace conditioning? a procedure in classical conditioning in which a conditioned stimulus and an unconditioned stimulus are separated by a constant interval (called the trace interval), with the conditioned stimulus presented first. What is the difference between forward conditioning and backward conditioning? Forward conditioning: Occurs when the neutral stimulus (NS) appears […]
Why is surface topography important?
Why is surface topography important? Surface topography refers to both the profile shape and the surface roughness (including the waviness and the asperity or the finish). Surface topography affects the film thickness to roughness ratio and the lubrication regime. These interactions become more important as the thickness-to-roughness ratio reduces. What is topography material? The topography […]
In which of the following cases is the electric field zero but potential is not zero?
In which of the following cases is the electric field zero but potential is not zero? 1. Electric field(E)=0 but Potential(V) is not 0: The electric field is zero at a point exactly midway between two equal and similar charges but the electric potential at that point is twice than that due to a single […]