Question

1.25) __ object a has a mass of 200 g and volume of 100 cm³. object b has a mas 400 g and a volume of 200 cm³. which object has a higher relative density? a. object a b. object b c. they have the same relative density. 26) __ which material is most likely to float when placed in water? a. aluminum b. styrofoam c. lead d. glass

Explanation:

Question 1.25

Step1: Calculate density of Object A

Density formula: $
ho=\frac{m}{V}$. For Object A, $m = 200\ g$, $V=100\ cm^{3}$. So $
ho_A=\frac{200\ g}{100\ cm^{3}} = 2\ g/cm^{3}$.

Step2: Calculate density of Object B

For Object B, $m = 400\ g$, $V = 200\ cm^{3}$. So $
ho_B=\frac{400\ g}{200\ cm^{3}}=2\ g/cm^{3}$.

Objects float in water when their density is less than the density of water ($1\ g/cm^{3}$). Aluminum has a density of about $2.7\ g/cm^{3}$, lead has a density of about $11.3\ g/cm^{3}$, glass has a density of about $2.5\ g/cm^{3}$, and Styrofoam has a density much less than $1\ g/cm^{3}$.

Answer:

C. They have the same relative density.

Question 1.26