Fidget Spinner& Physics

Abstract

Fidget spinner is a mechanical model of heaven which spins so perfectly and magically on the top of finger of a person. Fidget spinner have attracted an acute mass in pop culture. These are available in many shapes, designs and colors in the market. Fidget spinners help the people to reduce their stress and anxiety. To some extent fidget spinners are useful in treating people with ADHD, anxiety, autism and other mental or psychological disorders. Fidget spinner was the most popular toy among many other toys in early 2017. In this paper we will discuss how fidget spinner really works and what the physics behind its mechanism is. We will discuss how we can find out the spin time and moment of inertia of fidget spinner and how this pocket sized gadget obeys the rules of Sir Isaac Newton.

Roles and significance of chelating agents for potentially toxic elements (PTEs) phytoremediation in soil: A review

“…Chelation refers to the attaching a specific organic molecule with mineral or metal ions to form a metal complex (Kaushik, 2015;Martell, 1965;Tsang et al, 2012). In general, a chelating agent is a chemical reagent used to enhance the bioavailability of various PTEs in the soil such as Cu, Pb, Cd and others for metal translocation into a plant (Rena et al, 2022;Yang et al, 2021b).…”

“…Several chelating agents have been explored to examine their potential to enhance PTEs phytoremediation in soil (Aghelan et al, 2021;Kaushik, 2015;Mousavi et al, 2021). Chelating agents can be divided into two groups: natural and synthetic.…”

“…Hence, recently, there has been an increased interest in employing natural and/or organic chelants for phytoremediation technology (Chen et al, 2020;Huang et al, 2019;Singh et al, 2016). The natural and/or organic chelants, which consists of organic acids such as gluconic acid, citric acid (CA), 2,3-dihydroxy benzoic acid and homo citric acid are highly biodegradable in the soil which makes them suitable to be used on a large scale (Kaushik, 2015;Mousavi et al, 2021). Besides, metallothioneins (MTs) and phytochelatins (PCs) are also a part of natural chelators that have the capability to increase the mobility of PTEs in the soil (Gul et al, 2021).…”

“…Common types of chelating agents used for PTEs phytoremediation (Kaushik et al, 2015;Yang et al, 2021b). of soil, plant and metal as well as soil pH and cation exchange capacity (CEC) in the soil (Leštan et al, 2008;Shahid et al, 2014).…”