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Which of the following displays a noncontact force? a. Opening a door b. Hitting a golf ball onto a fairway c. Typing on a keyboard d. Two magnets pulling toward one another
asked
May 22, 2017
Physics
high-school
2
answers
4
votes
211k
views
How many half lives have passed if a sample contains one sixteenth of its original amount of radioactive material
asked
Jul 2, 2016
Chemistry
middle-school
2
answers
1
vote
82.7k
views
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