Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is the formula equation for this reaction? ○ F2(I) + Na(s) > NaF 2(s)

○ F2(g) + Ca(s) > CaF2(I)
️ triangle
○ F2(g) + Na(s) > NaF 2(I)
️ triangle
○ F2(g) + Ca(s) ​> CaF2(s)​

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.

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(jacemorris04)