b.The strong room of a school where an exam question papers are kept is made up ofrectangular metal bars.One bar has a width of 10 mmand would beable to withstand a maximum compressive stress of 20 MPa. i.Prove that,the minimum breadth of thisbar can withstand a burdened with a force of 3 KN. ii.If the bar in question is 2 mlong and decreases in length by 0.25 mmwhen aforce isapplied, then show thata percentage strain can be obtained. iii.What would be its Modulus of Elasticity, E? c.Due to the water crises that hit your area of residence lastyear, your landlord built an underground water tank for the tenants in the house. The dimensions of the tank is 400mmx300mmx100mm. Assuming the mass of the tank is 56.8Kg. Show that the volume of tank is less than 1m3and the relative density more than 4
you have been provided with a copper container of mass 500 gand contains 1 litreof water at 293 K. Prove that the quantity of heat which can be obtained will be able to raise the temperature of the water in the container toa boiling point if there are no heat losses. Assume that the specific heat capacity of copper is 390 J/(kg K), the specific heat capacity of water is 4.2kJ/(kg K)and 1 litreof water has a mass of 1 kg.
b.The strong room of a school where an exam question papers are kept is made up ofrectangular metal bars.One bar has a width of 10 mmand would beable to withstand a maximum compressive stress of 20 MPa.
i.Prove that,the minimum breadth of thisbar can withstand a burdened with a force of 3 KN.
ii.If the bar in question is 2 mlong and decreases in length by 0.25 mmwhen aforce isapplied, then show thata percentage strain can be obtained.
iii.What would be its Modulus of Elasticity, E?
c.Due to the water crises that hit your area of residence lastyear, your landlord built an underground water tank for the tenants in the house. The dimensions of the tank is 400mmx300mmx100mm. Assuming the mass of the tank is 56.8Kg. Show that the volume of tank is less than 1m3and the relative density more than 4
Step by step
Solved in 6 steps with 5 images
