![A copper wire was subjected to a tensile stress of 7.7 x 10^7 x 10 Nm−². Calculate strain of the wire. [young modules = 1.1 x 10¹¹ Nm−²]](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers.jpg)
by Sunday | Nov 8 | Physics JAMB
A. 2. 0 x 10^-5 B. 7.0 x 10^-3 C. 7.0 x 10^-4 D. 2.2 x 10^-4 Correct Answer: Option C – 7.0 x 10^-4 Explanation Young modules = Tensile stress/Tensile strain = 1.1×10^11=7.7×10^7/Tensile Strain ∴ Tensile strain = 7.7×10^7/1.1×10^11 = 7.0×10^7−11 =...
by Sunday | Nov 8 | Physics JAMB
A. 0.12 cm³ B. 4.00 cm³ C. 1.20 cm³ D. 0.40 cm³ E. no correct option Correct Answer: Option E Explanation increase in volume, DV = RV1 ∆θ = 3α V1 Dθ = 3 x 2.0 X 10-5 x 40 x (90 – 30) = 6 x 10-5 x 40 x 60 0.144 cm³ ∴ No correct...
by Sunday | Nov 8 | Physics JAMB
A. 50 N B. 520 N C. 220 N D. 80 N Correct Answer: Option D – 80 N Explanation Upthrust = weight in air – weight in liquid = 30 x 10 – 22 x 10 = 300 – 220 = 80 N
by Sunday | Nov 8 | Physics JAMB
A. remain at the same level irrespective of whether the liquid wet the glass or not B. falls below the liquid level if the liquid wets the glass C. falls below the liquid level if the liquid does not wet the glass D. rise above the liquid level if the liquid does not...
by Sunday | Nov 8 | Physics JAMB
A. 600J B. 150J C. 300J D. 450J Correct Answer: Option C – 300J Explanation K.E just before hitting the ground = P.E at the maximum height (conservation of mechanical energy) K.E = P.E = mgh = 1.5 x 10 x 20 = 300...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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