Which object is largest? star galaxy globular cluster planet?

GALAXY

Explanation:

Galaxy is the combination of all stars and all planets will all sun

So here we know that size of all stars and all planets are of the range of several kilometers

planet is is also of the radius of order of kilometers

Globular Cluster is of radius or range of several astronomical units

while we know that galaxy contains all the planets and stars along with the different sun in it

So maximum size here is the size of the galaxy

so correct answer would be

GALAXY

ice to water 1 water to vapour 2 latent heat

electric field is a function of 1/r^2

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