A steel bar (a=11.7x10-6m/m°C) is heated from an ambient temperature of 20°C to a temperature of 1100°C. Calculate how much the bar will expand (or shrink) if it has a starting length of 300 cm.

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Statics of Rigid Bodies Note: If you have already answered the problems in this post, kindly ignore it. If not, then answer it. Thank you, Tutor! Content Covered: - Method of Joints Direction: Create two problems based on the topic "Method of Joints" and then solve them with a complete solution. In return, I will give you a good rating. Thank you so much! Note: Please bear in mind to create two problems based on the topic "Method of Joints." Be careful with the calculations in the problem. Kindly double check the solution and answer if there is a deficiency. And also, box the final answer. Thank you so much!

The figure shows a wooden model to reproduce a metal piece ofaluminum through the sand casting process.a) How much mass (g or kg) of aluminum do you need to melt?b) How much energy Q (Joules) is required? Assume an initial temperature of 50 ° C and a100% thermal efficiency.c) What dimensions will the final metal piece have? all is in cm