Which statements are true regarding the cosmological principle?

the universe looks the same from all directions, but can change and evolve over time.
the universe looks the same from all directions, and hasn't and won't change or evolve over time.
the universe can't be studied scientifically because scientists can't directly test their hypotheses.
scientists can study the universe because the cosmological principle suggests that any physical laws or processes are the same for the entire universe.

Option (1)

Explanation:

According to the Cosmological principle, the universe came into existence from the big bang explosion. After which the universe has been constantly expanding in all the directions with all same homogeneous matter in it. The force that is generated due this explosion is uniformly distributed in all directions in the space.

This effects of the big bang explosion may also change in due course of time because of various factors and thereby, undergoing evolution and bringing changes to the existing scenerio.

Thus, the correct answer is option (1)

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy