1What is the total force exerted on the bottom of a 2.0-m diameter by 1.0-m deep round pool? The atmospheric pressure is 1x10^5 Pa and the Pwater 1000 kg/m^3A.) 3.4x10^5 NB.) 2.4x10^6 NC.) 3.2x10^6 N D.) 6.0x10^6 N The answer is ABut how? 2.) A piece of aluminum has a density equal to 2.70 g/m^3 and a mass of 775 gThe aluminum is submerged in a container of oil of density .650 g/m^3A spring scale is attached by a massless spring to the piece of aluminumWhat reading will the scale register, in grams, for the submerged metal? A.) 1.000 N B.) .788 NC.) .516 N D.) .258 N Ok I looked this one up on a few sites and keep getting the answer .588 kgBut that's not one of the answer choices? This is due tomorrow and I am soooooo bad at physics and would really appreciate helpThank you!!!!
Pfluid ρgh Pfluid is pressure in Pa or N/m? ρ is the density of the fluid in kg/m? density of water at 20C 0.998 g/cm? 998 kg/m? g is the acceleration of gravity 9.8 m/s? h is the height of the fluid above the object in m Ptotal Patmosphere + Pfluid Patmos 1.01e5 N/m? or 101 kPa What is the total force exerted on the bottom of a 2.0-m diameter by 1.0-m deep round pool? This seems to be a circular poolThe area is πr? or π1? or 3.14 m? The pressure is ρgh (1000)(9.8)(1) 9800 Pa force is pressure x area 9800 x 3.14 30800 N (A) is close, but not close enoughThe book is incorrect.
First response is correctThe newspaper needs to be crumpled up so that it has lots of little air pocketsFlat newpaper is no better an insulator than wood, and that isn't great.
