Answer: Avoid spilling of chemicals
Explanation:
The chemicals should be kept in air tight containers in order so that they cannot get spill over each other.
Cross contamination takes place when a different type of substance comes in contact with the different kind of substance.
The chemicals should be kept in a way that it does not comes in contact with the different one and get spoiled.
Chang gets paid a $50 bonus for every 100 pairs of shoes that he sells. Chang is being reinforced on a Variable Ratio schedule of reinforcement.
Variable Ratio schedule of reinforcement will give a person rewards after he/she fulfill a specific amount of works
A concussion can lead to a bad headache, changes in alertness or loss of consciousness. It is a violent jarring or shanking that results in a disturbance of brain function. Teens who suffer from concussions have a significantly higher risk of attempting suicide, being bullied, bullying others and or using alcohol or marijuana.
Answer:
Retrospective cohort.
Explanation:
The chemical substances can cause mutation in the organism's DNA. This mutation can cause different types of cancers like leukemia, sarcoma and carcinoma.
The retrospective cohort study is performed in the group in which the specific disease and its outcome is already known. This study mainly focuses on the facts that whether the individuals were earlier affected by the particular disease or not. The case given in the question represents retrospective cohort.
Thus, the answer is retrospective cohort.