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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",18,"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":427},"tk4tpC4TMd6cUyHLAZvDUrsvp7ytWR","q","Steel bars, each of length 3.0 m at 28°C, are to be used for constructing a rail line. If the linear expansivity of steel is 1.0 x 10^-5°C, what is the safety gap that must be left between successive bars if the highest temperature expected is 40^oC?","ans",[414],3,"1992","course","physics","exp","Gap ΔL = αL₁Δθ = 1.0 x 10^-5 x 3 x (40 - 28)
\n= 3.6 x 10^-2","opts",[422,423,424,425,426],"1.2 x 10^-1cm","8.4 x 10^-2cm","7.2 x10^-2cm","3.6 x 10^-2cm","1.8 x 10^-2cm",12,"12","initComment","initReply","actionData","errors"]

WAEC - Physics (1992 - No. 12)

Explanation

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