A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 11.8 kg and 1.98 × 10-3 m³. The density of gold is 19 300 kg/m³, and the density of quartz is 2660 kg/m³. Find the mass of the gold in the rock. MG = i

A certain pure 0.9999 gold bullion bar with a mass of 311 g has a volume of 16.1 cm3. What is the density of gold in appropriate SI units?

A rod extending between x = 0 and x = 14.0 cm has uniform cross-sectional area A = 9.00 cm2. Its density increases steadily between its ends from 2.70 g/cm3 to 19.3 g/cm3. (a) Identify the constants B and C required in the expression = B + Cx to describe the variable density. (b) The mass of the rod is given by m=allmaterialdV=allxAdx=014.0cm(B+Cx)(9.00cm2)dx Carry out the integration to find the mass of the rod.

CASE STUDY On planet Betatron, mass is measured in bloobits and length in bots. You are the Earth representative on the interplanetary commission for unit conversions and find that 1 kg = 0.23 bloobits and 1 m = 1.41 bots. Express the density of a raisin (2 103 kg/m3) in Betatron units.