, woe F . What one Ee et VP Creda Opec. {077 Give any TWO founding member states of a State S5Y TWO conmaros in Attic tat hve large ot rscerce. wr ay ©. Give Goh ae < [Seve emtvctogns of cing petroleum energy rcoeree, pI 4. Name four products of petroleum distillation and give one use for exch 6 © What is the name of oil resources that mala in rock pores afer saz entional mining of oi? What methods are usually used to mine such oi Bive two, ‘mining such oil? on ‘Wye -erpen) twat saab Slatin il "9 why is often done? 4) &- Give One (1) advantage and One (1) disadvantage of using Synthetic oil. 2 Vo Chemical @ sheet tet B > Witla cot oe 4 tines wh) a ace ck eee mee OT, i. Producers of | from Africa. - a ae oer rae a 00, at. ogee! oe ee A qeabend inte pres cf — 3) water. PU ad cls dag 1)“Explain the energy equivalent of 1 Btu. ‘Name any two examples under each energy resource: i. Fossil. ii, Clean energy. d. What are Green House Gases (GHGs)? Give Two examples of GHGs. e. When installing solar devices give two major things to be taken care off to leat maximize the energy output. 0. gg’\& f. In the following countries where should the solar devices face: i, Egypt int) ii, Madagascar a MI a : ot Nose g. What does SAPP stand for? Name any Two SAPP member states? Bl h. Name any Two semiconductors that are used in making solar cells. 2 i. Give any Two examples uhder each type of biofuel: i, Gaseous. 2) ii, Liquid. Q j. What is Pyritic Sulphur? How is it reduced from coal ore? Bl k. Ina nuclear fission reaction mass of reactants is not equal to mass of products. State an equation that relates the “missing mass” to energy. 1 (2) I. Give any Two radioactive Isotopes that can be used in nuclear fission. a\Os, oun! UNIVERSITY OF BOTSWANA‘ Department of Physics GRC 283: Bnergy and Society CLASS QUIZ2 Instructions: Tick the appropriate box to indicate your answer : ‘arin eal in Bowwens, i a \e i 40 ® Mnabeehin + Mord M at 2 Mor a ud i Cun“ — * RR 4, Apart from gaseous emissions, what material is produced in large quantyies feat Abr ce fo make cthel IK mf wai Ba gn 7 ung t tit: Koel fe Invictus yy aA UNIVERSITY OF BOTSWANA Department of Physics GENERAL EDUACTION COURSE (PHYSICS) 202223 GEC 253: Energy and Society TEST: 2 Duration: 1 hour INSTRUCTIONS: () Answer Any TWO (2). ‘Date:02™ November 2022 —— (a) Name two elements found in coal under each category, Radioactive Uru 6 Tierwui” a i) Organic ychay CN, Gabon, Oxyg€ , Krduyer) eS () Briefly explain how coal deposits form, you may use the aid of a diagram ‘A-certain coal has a carbon content of roughly 80% per kg. Work out the number of kilomoles of carbon, hence, calculate the amount of carbon dioxide released (in ‘completely burnt in the presence of oxygen. Molar {6 © kilograms) when 5 kg of coal is mass of Carbon (C) and Oxygen (0) is 12.0 kg/kmol and 16.0 kg/kmol, respectively. {10} atlable Question 2 f cad fa, fone) oF tg Conquer! bec (a) What is Biogas? cectalyen nily BI 10a & ¢ ) irs ee tc ion ol J orto a (6) Explain the process of Pyrolysis of biomass and give its advantages.~., Wy: fi (@ What do you understand by the phrase “Energy Planting” modern Dm wes © ote oe Oe is a combustible gas produced from catalytic fe ‘What are the constituents of SYNGAS? 2 aco ga Question 3 (2) Which region of the world has highest deposit of crude oil? Name any three countries with abundant oil deposits in the region above. a (b) Give Two (2) disadvantages of using petroleum energy resources, Ql (©) Name four products of petroleum distillation and give one use for each. 8) (@) What is “tight oil”? What method is usually used to mine such oil and give two {6) disadvantages of the mining such oil?Conver oe (OWVENIOD aera a eee EN h ee ae 4 chang i. - Le Gane pp tighter ea One} © Cute oi , / r a) \ i | ie il (ould te Met may | y | fc ean cl tg a 4 eur O1 ) Cie Ot Rex i) Pat a 9 ot et itl wire fey lubricant a her ymnetic OU, wed @ 0s! q rete! fom pewolat cnet povided Sipe rac dm nan Ave Tue found if ; Lier neal oil ExmpHS. NEC ew of, Kd Lyuted Rew kaar Gy [2d Reding, Lig tly t ‘Wel Aer a eat ADHACRS OF SHWTHETC OL Lgual a ciat a 4 shen tilt | eH VENY CF deel engi het |- Moraine ny ta Tat of peta), engne 6 i Reson > cin Pin) bbc “Das Dict ey ‘Kemene “ pro aki ra "pent ~Uphing, Bete heen a haa aes Me Ol cakny genSe ence eee of the ilo | € fir ah & Nai A to amt rel ia TOJETVED. donne ~~ ®) oF Oe Bah y ae UP Cue Q) i. iil Ord ck Nay ia ee sd of cil, GP te ape st ogad i a Se AL RBER 67 cee I 5, Ey te Liddle fay a5 2. Eng ne Wek i mary fost erent tanh ir (ny Oe | 3 a aid it iu ‘a4 of acer, om Mert amet nel a th ie nee “ en & COE On Exe ino HOE ox REEREy (wntay Meer ex 4y conventern) technique ug Ogn oh SENG) O€ mebed of Ope. lea retoned : on ‘the source ha 1) Brpring Guntigy Ol aid VEHTOL Fy ons utugeR By u eh ie gl ts etl i, ©) Soult pias « = 269 Gbbi pds on bt fn if © MVP on) 4 om jad al ana NN b) haa Chile on diierene "chem 4100 + caveni ) hag ace et) a. ee, a Sng cistiktu oven uhy wi ot 1Nrtadd, When «conelective al fart of ‘the woo mS {or booms ct) ae ae Came reat abe pode oxygen al tre} gud ? teDecyeae yon) -brtity , when anvvoa) ¢ plant Ae wed os fill they cant be cddel +0 Sal fertitiger. Hr Not ely +0 yt biomad in row fovin Ine &9 Gal. tr QuerctectiF) wool an desta ore) * Prelced Flap re) & opt pA! €! gna evel ain be uve] to repla® the Crude oil. b eet “1 it often tw botuel fs “thet ma) aon pelea a a : Coincas) ans Way" Grulyteq) Theimal coc does SwWGAs. SWGAS je ont gpsecus INTHE OF ydnge ‘ arbon menbxide.. ~ pwclleto of chav, id Fis fora) 5 PHOWA) reprevemts hart} the WOMOS to dive off the wigtle yatier 4 Having behind oe chao“ee _BivEweERG a stot 1 fetes fl ve Ganing gtet ‘ vt tb geolagc) frnaton —— liga connovior of nendlF 5 Bioenewy (14%) Aydropawer( 34) tidal gectierma!yyad 1%) fio re cun is converted to choma) Coumay) via phangytthevs, Coe + Heo Lathts g, 4 Cotta0e (0 § Biomass re gat ese ea eg i : PPA) weg hu Ope # Go at {pete avr saaye of 0 my tog nd ae i pace fo . in the ‘8 ettanol Cole SC Crcntohadio® 7 : C02 “auton dics fe finncrten 15 ce in Ae ere of an ciaerobic. renee. (ommon P plen'S thet are ut a feeclotock for “ro. pice!» tg? canes suet BioGaS gan Borie! a io ue Hey mal exttor (manure @ biadegeidabe Conpayad of castun dionicle atid aor. H ive to power vehicRS ail povicle olectré f+ Doyen Of WheNe the gay. iv pus, it an be lore! fil 9 seamp gps & cigartion gas The vimplitd equation fer tye aenarebl xn d Colin = £0, +3C He Cmethand NO The pray is alo fo fmeirtien of byorp JIE UKE for the proctcten warily it ie Of hoetharl (rt Bocas Diarsi0gQr ¢ edhe CLASS QUIZ1 D: wang 0 o Which of the follow tin) following are Conventional energy resources? (Maximum of Three 0 Wind energy Col O Tidal © Bionsn ©, Y Peat 3. Solar energy reach the earth surface in the form of; (Maximum of Two ticks) O Nuclear Fission (& Infra-Red Radiation ) (1 Nuclear Fusion (Binding of Hyds6gen Isotopes) IY Visible ight (Photon " Order the following Te Gatsby onpopot ic, 1 Cages) 0 omales) of ! ler ee ‘db jo° om My a British Thermal aus s4xle . D Exajoule ". z 4 Heres ye, Blectronvolt 6 B JouleZ tilted, and facing either roughly m ay installed 5) the direction the solar, 5. Solar devices are generally rards) or S(southwards) cree notes 1D South Africa Indicate by T (true) or F(false) the atmosphere solar is ra fale. hours when the sun is lower in the Fo Inthe moming xs ae tne temperate iil OPCal frit x 36K | cal (RW leas, FOX 3.bX 10" | ca) — Hey = 4302 10325 ql ’ eS 8 o2 * 4.30 x 10% @l a bt > @l (h) ood » Iai en aaa yl S4X {00% 1055 y al i! tise = (06.500 418 ~ 25 US.05Iyl 02 aa) 4 cal ~ 152X104 a mnthe Ged ray fin wana) “the cath, hi ie Heaving the almauphere via ch thereafter ira) ratQUESTION2 3) (a) Convert the following into calories (cal) By (500 kWh. BI ii) 100 Bru, luce is il per day. 79% of the produ illion barrels. 11) of crude oil per d .d in 5 days if S eaten td Terajoules (13) is exported i 6) IbbI is equivalent to 6.12 x 10°)? frigerator on. If (©) A family goes on holiday leaving one 60 W bulb and 1.4 Pecos the meter reading in the house is 240 kWh, how many days (5) Power goes out? E= Prt ear ‘ices at (@ Name three components of solar radiation that is intercepted by solar devie BI the earth surfaces, gin e - Bean (©) What is the difference between Photovoltaic and Thermal solar energy? (6) 7 Meecha ® F oe J ct atbyorbet enter a QUESTION 3 fem-crelc Le gerd enclctoO) @) What is the advantage of using solar tracking systems, Why are tracking systems not popular despite their importance? 2) (©) In fixed installations of solar devices what two things (parameters) determine how much solar radiation is received? 2] (©) Explain any two differences between Conventional and Concentrator solar systems? 2) (@ Name three examples of Solar Thermal Concentrator Systems, B) (©) Name any three types of Silicon solar cells in order of increasing efficiency. Thus, from least to highest efficiency. [6] (© Why are Silicon solar cells very popular inthe market? i) (8) Give any three advantages and three disadvantages of using solar energy resource, (6] Give any three Solar projects (completed or sed) in Botswana, BI TEST xu Gl 000 bet x. Kak WicdUNIVERSITY o} F BOTSWANA Department of Physics GENERAL EDUACTI aes, ‘ACTION COURSE (PHYSICS) 2022/2023: Sem-1 : Energy and Society TEST: 1 aaa abage NDdIWATERA Duration: 1 HR INSTRUCTIONS: IONS: Answer Any Two Questions. Each question carriers 25 marks USEF - ‘UL mathematical information: yo - 3 1 Giga (G) =10° Les - © 1 Mega (M) =106 aa- 4 1 ton =1000 kg qea- it 1 Tera(T) = 10° Mega =10' e 1KWh=3.6 x 10°F ba - 1¢ 1 Btu = 1055 J 1x 10° Btu = I quad 1 bbI= 6.12 x 10° Teal = 4.1845 1 toe = 1.163x10" KWh_ QUESTION 1 ‘ (4) What is the effect of rising Green House Gases (GHGs) concentration in the atmosphere? 2) (b) Name at least three GHGs you know. B) (c) What do you understand by C026? Bl (@) Give any three challenges the word i facing in an endeavor to reduce dependency © fossil fuel energy resources. 8) (€) Give two examples for under each: ms (i) Commercial energy resources. “Meatwval go 2) (ii) Non-conventional energy resources. - y= 2) (ii) Dilute energy resources. >, su i i 2) (f) List the five ultimate energy sources. w cea (5) ewwl oh en wi isbn lat p20 (g) Name the three energy resourcesQue 4 Prep cobelane pa) — * Bemeg # Deore ~ meal x ta Wich of the PH Bey Btwn aera) a ecgy ant y kW kum Athtond inp fae a eM a ay = TOE f PPM Sdn es al es HUE 1 dilute re racial A ne 5) Wnd- D Ocean - Dine £) Bomas~ C cok -D 4: Cabin dicude gus in te ot mph xd PPM. what dog ppt sons abr 2 © Part por milion Ui eet enewgy inty kwh, ~ 10! Bay | | den tery saa WyMiCle fom tek-ars = 1R2SAAyS {doy = 0.044 Quads Kile Mega « 419 “Tera ba [dey = 0-094 >< 1easy= 35.05 Qtod —? 64 155.05 Guts x _0%6tU eel 1.605110" Bt he op06 110 Bt Quad Noo sera 4 oe vA =a g es) Tx 0" 135,05 10 eu hyaysroxio0 OS jepxie®d a 1a 135 05 Gye XMM 57 rant LGud Bed wy x AO5S FI kwh fa *Souy 13508 X 10'S x og