Assume that the United States wanted to have its own $2 coin. The inner coin will be made of
copper, and the outer ring will be made of aluminum. At 25°C, the copper coin will have a diameter
of 10 mm, and the outer aluminum ring will have a diameter of 9.999 cm
To fit the two parts together, they are both heated up. Calculate the temperature at which the inner
copper coin just fit inside the outer ring? Hint: Assume linear expansion in the radial direction.
Assume That The United States Wanted To Have Its Own 2 Coin The Inner Coin Will Be Made Of Copper And The Outer Ring 1 (30.16 KiB) Viewed 51 times
Assume That The United States Wanted To Have Its Own 2 Coin The Inner Coin Will Be Made Of Copper And The Outer Ring 2 (32.99 KiB) Viewed 51 times
Assume That The United States Wanted To Have Its Own 2 Coin The Inner Coin Will Be Made Of Copper And The Outer Ring 3 (32.99 KiB) Viewed 51 times
Q4. In Canada, the $2 coin consists of a smaller round metal coin made of aluminum bronze (92% Cu, 6% Al, 2% Ni) inside a larger metal ring made of 99% nickel. Assume that the United States wanted to have its own $2 coin. The inner coin will be made of copper, and the outer ring will be made of aluminum. At 25°C, the copper coin will have a diameter of 10 mm, and the outer aluminum ring will have a diameter of 9.999 cm To fit the two parts together, they are both heated up. Calculate the temperature at which the inner copper coin just fit inside the outer ring? Hint: Assume linear expansion in the radial direction.
Substance Ice at 0° C Lead Aluminum Brass Copper Concrete a (10-5/°C) Substance 5.1 2.9 2.4 2.0 1.7 1.2 Steel Glass Pyrex glass Diamond Invar Fused quartz a (10-5/°C) 1.2 0.4-0.9 3.2 1.2 0.09 0.04
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