hi, I am 13 years old and i am trying to become a physicist, and I would like to know if this theory of mine is correct or just stupid: Can light speed time dilation be possible, and can it potentially make time travel possible?

An object has a weight of 500 on earth what is the mass of this object

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?