Câu 47: Cách pha chế dung dịch từ hoá chất tinh khiết, phát biểu sai: A. Tính khối lượng chất tan
B, Cân chính xác khối lượng chất tan bằng cân phân tích
CHoà tan hoàn toàn chất tan bằng V, (I) nước cất (V=V cần pha)
D. Định mức đến V (1) bằng nước cất, dùng bình định mức

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

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