If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
Answer:
Research of B. F. Skinner
Explanation:
Burrhus Frederic Skinner was born on March 20, 1904, and died on August 18, 1990. Skinner considered that human actions were consequences of actions done in the recent or distant past. He thought that free will was just an illusion and that we are guided by our past actions. If the actions had good outcomes we are encouraged to do them again, and if not, we are more likely to not do the same actions again.
For the safety of everyone inside a vehicle, the driver should place his cellphone inside his bags to avoid being tempted should there be a call or text. He should not place it where it can be visible and highly distracting during driving. Drivers can also hand over their cellphones to a passenger and that passenger will make sure it won't be of any distraction.
Answer:
Hinduism reinforced a strict social hierarchy called a caste system that made it nearly impossible for people to move outside of their social station.
Explanation:
Hinduism reinforced a strict social hierarchy called a caste system that made it nearly impossible for people to move outside of their social station. Emperors during the Gupta empire used Hinduism as a unifying religion and focused on Hinduism as a means for personal salvation.
