Need Help with a Physics Problem 谢谢！

Explain instances of energy transfer by waves and objects in everyday activities (why the ground gets warm during the day, how you hear a distant sound, and why it hurts when you are hit by a baseball.)

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• 我中学时称物理：不理 -ymjsrmama- ♀ (284 bytes) () 07/15/2015 postreply 09:33:41

• Thanks for answering the heating ground question. How about the -my176- ♀ (0 bytes) () 07/15/2015 postreply 09:38:55

• LOL， 你又谦虚了吧 -jingzhumama- ♀ (18 bytes) () 07/15/2015 postreply 09:43:36