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- A disc \( 30 \mathrm{~cm} \) in diameter and \( 10 \mathrm{~cm} \) thick, initially at uniform temperature of \( 265 \backslash \mathrm{deg} C \) is immersed inliquid at \( -15 \backslash \operatorname{deg} C \). The convective heat - transfer coefficients on ends and on side are 340 and \( 1420 \mathrm{~W} / \mathrm{m} \) ? . K, respectively. Determine (a) temperature at centre of disc, (b) temperature on surface atcentre of one end, (c) temperature at \( 4 \mathrm{~cm} \) away from one of its flat faces and at radius \( 10 \mathrm{~cm} \), and (d)heat transfer rate, after 5 mins? \( \mathrm{p}=7854 \mathrm{~kg} / \mathrm{m} \backslash \mathrm{deg}, \mathrm{Cp} \) \( =487 \mathrm{~J} / \mathrm{kg} \cdot \mathrm{K}, \mathrm{a}=14.82 \backslash \) times \( 10-6 \mathrm{~m} ? / \mathrm{s} \)
- A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the right of vertical. Which of the following answers could explain this phenomena?
- Two simple pendulums \(A\) and \(B\) consist of identical masses suspended from strings of length \(L_{A}\) and \(L_{B}\), respectively. The two pendulums oscillate in equal gravitational fields.
- A steel strip which is 10 in. long, - in. thick, and 0.5 in. wide. The allowable stress and modulus of shear for the steel is 12000 psi and 11x10^6 psi respectively. Determine the torsional spring rate. a) 2866.972 lbf/ft b) 1866.972 lbf/ft c) 1866.972 lbf/in. d) 2866.972 lbf/in. Give correct option only
- A steel strip which is 10 in. long, - in. thick, and 0.5 in. wide. The allowable stress and modulus of shear for the steel is 12000 psi and 11x10^6 psi respectively. Determine the torsional spring rate. a) 2866.972 lbf/ft b) 1866.972 lbf/ft c) 1866.972 lbf/in. d) 2866.972 lbf/in.

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