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These resources are designed to help you familiarize yourself with the exam format, identify key topics, and practice effectively. Whether you're preparing for the May/June or GCE sessions, our curated materials provide both objective and theory questions to enhance your study sessions.","tags","waec nigeria west africa examination council","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",10,"createdOn",1755991949910,"updatedOn","questionsCount",27220,"courseCount",23,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":405},"EHeosNBYx1iD2nBfUTCqdupkGNsqCT","q","A 90-W immersion heater is used to supply energy for five minutes. The energy supplied is used to completely melt 180g of a solid at is melting point. Neglecting energy losses to the surroundings, calculate the specific latent heat of fusion of the solid","ans",[414],4,"1998","course","physics","exp","Pt = mL
\n
\nL = \\(\\frac{pt}{m} = \\frac{90 \\times 60 \\times 5}{180}\\)
\n
\n= 150Jg\\(^{-1}\\)","opts",[422,423,424,425,426],"0.5Jg^-1","2.5Jg^-1","15.0Jg^-1","450.0Jg^-1","150Jg^-1","23","initComment","initReply","actionData","errors"]

WAEC - Physics (1998 - No. 23)

Explanation

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