What is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

the results is a decrease in air temperature with an increase of altitude.

explanation:

the right answer is 0.3 meters per second