Homework Statement
You have 0.0625 grams of an unstable element and 0.9375 grams of the stable daughter product. How many half-lives has it undergone?
Homework Equations
N=No (1/2)^(t/(t1/2))
In which
N represents the final activity for a period of time
No is the original activity
t...
Does it mean that the phaser is also included to have the total mass of 103.2kg?
For the reason why I added the two speeds together...I think I had been misled by another question I just done
Homework Statement
A space person is motionless a distance of 500m away from the safety of the spacecraft . The person has exactly 11.32min of air left and the person's mass is 103.2kg, including equipment. The person throws a phaser at a velocity of 50.2km/h away from the spacecraft in order...