3. Fill in the blanks with the appropriate numerical value and pay attention to

Question

3. Fill in the blanks with the appropriate numerical value and pay attention to number of significant figures. (6 pts) 5.43 kg= 1,2 x 105 m 48 cm = Im Determine the volume of a sphere of radius 3.8 cm in units of both cm3 and m3. Use thc proper number of significant figures in your answers. (10 pt) 4. Volume cm 5. Evaluate the following expression, giving the result in scientific notation and using the proper number of significant digits. (3.45x10)(8.973x108) (1.4x1022)(4.893x10-4) 6. Define mass density, both in words and in equation form. Find (go to the literature) the mass density in units of g/cm3 and kg/m3 for a) balsa wood b) honey, and c) platinum. Assume room temperature. Density of Balsa: Density of Honey: Platinum: kg/m3 cm g/cm3- kg/m3

Explanation / Answer

3) 5.34 kg = 5430 g

1.2*10^5 um = 1.2*10^5*10^-6 = 0.12 m

5 mm = 0.005 m

48 cm = 0.48 m

4) Volume = 4/3pi*r^3 = 4/3*pi*(0.038)^3 = 2.3*10^-4 m^3

= (2.3*10^-4*10^6)cm3 = 2.3*10^2 cm3

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