Hag question 28. A eureka can of mass 100g and cross-sectional area 100cm² is filled with water of density
1g/cm A piece of metal of mass 20g and density 8g/cm is lowered carefully into the can as
shown.
100m
Calcul
a)
The total mass of water and Eureka can before the metal was lowered
(3n

an electric circuit

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.