Answer: d) 312.5 mg
Explanation:
This problem can be solved using the Radioactive Half Life Formula:
Where:
is the remaining amount of Actinium-226
is the initial amount of Actinium-226
is the time elapsed
is the half life of Actinium-226
Knowing this, let's find :
Answer:
The pilot must be began at an altitude of 826.53 m to avoid crash into the sea.
Explanation:
Given that,
Velocity = 270 m/s
Acceleration = 9.0g s
We need to calculate the altitude
Using formula of centripetal acceleration
Where, v = velocity
r = altitude
a = acceleration
Put the value into the formula
Hence, The pilot must be began at an altitude of 826.53 m to avoid crash into the sea.