Question

To determine the volume of a sphere, you measure its diameter using a ruler an obtain a value of 15.2 mm for the diameter. Using this diameter, you convert the diameter to units of centimeters by dividing the radius by 10 mm/cm and then you divide the diameter by 2 to obtain the radius (r). You then use the equation V = 4/3rr to obtain the volume of the sphere. To determine the mass, you measure the mass on a balance and obtain a mass of 20.4538 g. You then calculate the density by dividing the mass by the volume. Determine which of the following density values has the correct number of significant figures 10 g/cm3 11 g/cm3 11.1 g/cm3 11.12 g/cm3 11.124 g/cm3 11.1236 g/cm3 11.12356 g/cm3

Answer 1

osom Given; diameter (dl) = 15.2 mm = 1.52 cm radres (n) = d = 1:52 = 0.76 cm Volume (x) = 33 * 4x3:144 (0.76)2.cm3 Volume (V) = 1.8 38] cm3 mass = 20.4538 g density = mass 20.4538 $11.124099 cm3 volume 1.8387 density = 11- 124 g / m3) An