Một viên bi thả lăn không vân tốc đầu, từ đỉnh mặt phẳng nghiêng dài 30m. viên bi chuyển động nhanh dần đều với gia tốc 0,2m/s 1.hỏi bao lâu để viên bi đạt vận tốc 1m/s

vien

Explanation:

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

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