Higher Education Loans Board HELB application for 22/23 is now open. HELB is offering the following services: 1. First time Undergraduate application 22/23 2. Undergraduate Subsequent application 22/23 HOW DOES ONE APPLY FOR THE FIRST TIME? 1. Visit the HELB website at www.helb.co.ke to access the student portal and click on "create an account" in order to register. 2. once the account is created, login and fill in the correct details on what education level you are applying for, example will be (degree) for undergraduates. select whether you are employed or not and search. 3. Select the appropriate undergraduate first time application form follow as instructed. here is the link https://www.helb.co.ke/helb-products/helb-loans/undergraduate-loan/ TO REGISTER or ACCESS THE STUDENT PORTAL DIRECTLY FOLLOW THE LINK : STUDENT PORTAL to sign up follow: SIGN UP to the student portal credit :HELB OFFICIAL sign up page HOW DOES ONE APPL...
Illustrate the mechanism for ozone destruction by CFCs. The sun emits different types of wavelength, among those, we have UV light (Ultra violet light). The UV light would be very damaging if it were to come in contact with us including damaging the DNA and giving sunburns. Figure 1 types of ultra-violet radiation penetrating into the earth’s atmosphere and ozone layer. As shown in figure 1, we are protected by a layer of Ozone which accumulates in the upper atmosphere of the earth and absorbs the UV radiation (UVB and UVC) before it reaches us. Stratospheric ozone (O_3) is produced by the combination of an oxygen atom (O) with an oxygen molecule (O_2). O_3+ UV => O + O,UV light strikes an oxygen O_2 molecule, splitting of the O atoms O+O_3↔O_2,O_2 reacts with O to form O_3, since its reversible, UV light also splits O_3to O_2+O In the upper atmosphere, allotropes of oxygen exist. They include O_3, O_2and o. They are all in equilibrium with each other hence they interconv...