-4 points SerCPID R P002 The British gold sovereign coin is an alloy of gold and

Question

-4 points SerCPID R P002 The British gold sovereign coin is an alloy of gold and copper having a total mass of 7.988 g, and is 22-karat gold (a) Find the mass of gold in the sovereign in kilograms using the fact that the number of karats = 24 " (mass of gold)/(total mass) kg (b) Calculate the volumes of gold and copper, respectively, used to manufacture the coin volume of gold volume of copper (c) Calculate the density of the British sovereign coin. kg/m3 Need Help? ReadN My Netes Ask Your The four tires of an automobile are inflated to a gauge pressure of 1.9105 Pa. Each tire has an area of 0.025 m2 in contact with the ground. Determine the weight of the automobile Need Help? Rrd .-s points SerCPSD R P020 The spring of the pressure gauge shown in the figure below has a force constant of 1,360 N/m, and the piston has a radius of 1.23 cm. As the gauge is lowered into water, what change in depth causes the piston to move in by 0.750 cm? Need Help? uad

Explanation / Answer

a) Densitygold = 19.3 g/mL, densitycopper = 8.96 g/mL

massgold / masstot = 22 / 24

massgold = 22 / 24 * 7.988

= 7.322 g = 0.00732 kg

b) masscopper = 7.988 - 7.332 = 0.656 g

volumegold = 7.322 / 19.3

= 0.379 mL = 3.79 * 10-7 m3

volumecopper = 0.656 / 8.96

= 0.073 mL = 7.3 * 10-8 m3

c) density = 7.988 / (0.379 + 0.073)

= 17.6 g/mL = 17600 kg/m3

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.