Question

5. The buoyant force on a Styrofoam sphere that is 10% submerged in water is smaller than the buoyant force on a metal sphere that is 100% submerged in water, if the volumes of the two sphere are equal.

True / False

6.Molecules in liquids are, on average, farther away from each other than the molecules in solids.

True/False

7. Molecules of gas all move at the same average speed, if the temperature is held constant.

True/False

Answer 1

5) Let volume of both Heheres = V (As volumes of both spheres are egnal) Let density of of water = 9 Acceleration due to gravity =g Now, Volume of displaced water Volume of sphere submerged in water. Volume of Styrofoam sphere submerged in water = V = V = 10 % of V =) VE lo V Too lo v = Volume of Metal sphere submerged in water = V2 100). of v =) Vz loo V = V =) Vz = loo Styrofoam sphere Metal sphere water 10). submerged O louvy. submerged of - =VI of displaced m Now, volume displaced water by Styrofoam sphere V lo Volume water by metal sphere = V₂ =V Now, Buoyant force sphere is given by FE = (Volume of displaced water) ( density of water, g - Broyant force Styrofoam sphere Foi = FEI lo Broyant force metal sphere Fe2 = V2 9 g 2 and have FBI < FB2 Vis g VP9. = FB2 - veg From O 2 me

Buoyant force Styrofoam sphere is smaller than buoyant force on metal sphere. Hence, giren statement is True.