Which energy change best relates to a boulder that is rolling down the side of a hill? potential energy transforming into kinetic energy
mechanical energy transforming into thermal energy
potential energy transforming into electromagnetic energy
mechanical energy transforming into electromagnetic energy

Answer : Option A) Potential energy transforming into kinetic energy.

Explanation : When the boulder is rolling down the side of a hill, it shows that when the boulder is at rest at a certain height on the hill, it has potential energy stored in it. When it is rolling down the hill the potential energy gets converted into kinetic energy as it gains velocity while moving down the hill. So, the complete energy transformation that is occurring is potential energy to kinetic energy transfer.

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.