A train is resting on a track when another train with several more cars bumps it and causes it to move forward 10 meters. This is an example of acceleration because:

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

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?

Which planet do you think would be easiest for humans to colonize some day?