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Please I need help with questions 20 and 21 and it’s very hard and I’m struggling with it and if you need to see the picture big then click on it and it will be big

Please I need help with questions 20 and 21 and it’s very hard and I’m struggling with it and if you need to see the picture big then click on it and it will be big
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1 vote
Please I need help with questions 20 and 21 and it’s very hard and I’m struggling with it and if you need to see the picture big then click on it and it will be big

Please I need help with questions 20 and 21 and it’s very hard and I’m struggling-example-1
asked
User Updogliu
by
8.1k points

1 Answer

4 votes
20.) Sound can not travel in a vacuum.
21.) Kinetic energy is energy that is being exerted or used.
answered
User Rangachari Anand
by
9.3k points
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