2.A car moves from a position of 10 meters from home to a position of 30 meters from home in 10 seconds, what is the average velocity of the
car?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a. sample absorbance at 315nm a 0.45 b 0.80