It is a safety procedure in industries that lock dangerous machines and ensure that there is no operation until maintenance or repairs have been made.
Answer:
Both reactivity and electronegativity decrease down a group.
I'm assuming this is multiple choice...
Explanation:
Answer:
40 weeks
Explanation:
A product life cycle refers to the sequence of stages which a product goes through. There are four stages of product cycle, they are introduction, growth, maturity and decline. The life cycle of a product is always associated with changes in the marketing situation. Nowadays, the a product life cycle usually lasts for about 40 weeks.