Question

Find the liquid pressure at the bottom of a 50m deep container that carries ethyl alcohol. For the following problem, assume a constant temperature. With an initial pressure of 500pa, what is the final pressure inside a container after it undergoes a volume change from 10 m^3 to 2m^3? A 25kg sphere is balanced on top of a table. The sphere covers an area of 10m^2. What is the pressure applied to this table? Draw the electric field lines between a positive charge and a negative charge and negative charge that are 2 m apart. What happens to the magnitude of this field when their original distance is increased What value do you get if they both have a charge of 0.0002 Coulombs? Given: k = 9times 10^9 Nm^2/C^2. What is the resistance of toaster that draws a current of 6A when connected

Answer 1

21)

depth, h=50m

density of ethyl alcohol, rho=789 kg/m^3

pressure =rho*g*h

=789*9.8*50

=386610 Pascal

22)

temeperature is constant

initial pressure, P1=500 Pascal

volume, v1=10 m^3 , v2=2 m^3

use,

P1*v1=P2*v2

500*10=p2*2

===> p2=2500 Pascal

final pressure, p2=2500 Pascal

23)

mass of the sphere, m=25kg

area, A=10 m^2

pressure, P=F/A

P=m*g/A

P=(25*9.8)/(10)

P=24.5 Pascal