Maglev trains, like the one shown in the picture, use magnet fields to travel up to 600 miles per hour. Magnets on the bottom of the train and on the tops of the rails have similar magnetic poles. Based on properties of magnets, how do these magnets affect the train?A) The two magnetic fields repel each other, causing the train to levitate, or hover, above the rails.
B) The powerful magnets greatly reduce the force of gravity, resulting in less friction and greater speed.
C) The train is able to stop immediately because the magnets on the rails attract the magnets on the train.
D) Maglev trains have extremely powerful magnets, greatly decreasing the force of gravity and allowing them to float.

a and b sometimes have a positive value

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.