Entropy is measure of chaos or disorder. Entropy of the universe is increasing that means it is positive. Entropy is positive for irreversible process. For entropy to be negative which means for it to decrease, heat must be removed from the system. It will reduce the disorder of the system that is this process will bring order in the system and hence, the entropy would be negative.
heat is removed, because entropy is the thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system
When the planet is closest to the Sun, speed v and kinetic energy are the highest, and gravitational potential energy is the lowest. When the planet moves farther away, the speed and kinetic energy decrease, and the gravitational potential energy increases.
Use P=F/a whereas P= 350000 and a=.9m2 substitute into the formula we get 350000=f/.9m2 multiply .9 on both sides as LHS=RHS WE get 315000 Newtons as the answer
The two types of vaporization is EVAPORATION and BOILING. The difference is evaporation only occurs on a liquid’s surface; boiling occurs on both the surface and throughout the liquid.