After 3 half life periods you would have 5 grams of krypton left because half of 40 is 20 half of 20 is 10 and half of 10 is 5
Answer:Mass number - Atomic Number = Neutrons
Explanation:
If the winds move from east to the west they are called easterlies and when the winds move from west to east they are called westerlies.
Explanation:
When air moved in a definite direction it is caller wind.
Answer:
105
Explanation:
Density = mass/volume
therefore volume = mass/density
826/7.9=105 (To three significant figure)
Answer:
Speed is how fast you are going at the moment but acceleration is how fast you are building up speed to get to a set point
Explanation:
