The concept of adulthood is subjective and varies across cultures and societies. In many cultures, 30 is generally considered the age at which individuals are expected to have achieved a certain level of maturity, independence, and responsibility, and are therefore often seen as adults. However, in some contexts, adulthood may be defined by other factors such as financial independence, marriage, or parenthood. Ultimately, whether someone is considered an adult at the age of 30 depends on the specific cultural, social, and personal perspectives at play. **

The age at which one is considered an adult varies depending on cultural, legal, and social norms. In many countries, including the United States, the legal age of adulthood is 18, when individuals gain the right to vote, sign contracts, and make their own medical decisions. However, some argue that true adulthood is not reached until a person is in their late 20s or early 30s, when they have gained more life experience, financial independence, and emotional maturity. Ultimately, the definition of adulthood is subjective and can vary from person to person. **

Both pure Germans and pure Celts can have a range of hair colors, including blond and red. While the stereotype of Germans being blond-haired and blue-eyed is common, it is not accurate to say that all pure Germans have these features. Similarly, while red hair is often associated with Celtic heritage, not all pure Celts have red hair. Hair color is determined by a complex combination of genetic factors, and can vary widely within any ethnic group. **

Some parents may still want to meddle in the lives of their adult children over 30 because they may have a hard time letting go and accepting that their children are independent adults. They may also feel a sense of responsibility for their children's well-being and want to ensure they are making the right decisions. Additionally, some parents may struggle with the transition from being the primary caregiver to taking on a more supportive role, and may find it difficult to relinquish control. Ultimately, it may stem from a place of love and concern for their children's happiness and success. **

Yes, pure hydrogen is flammable. It is a highly flammable gas that can ignite and burn in the presence of oxygen. **

Pure oxygen is oxygen that is not mixed with any other gases or impurities. It is a highly reactive gas that is colorless, odorless, and tasteless. Pure oxygen is often used in medical settings, scuba diving, and various industrial applications. **

A mixture is a combination of two or more substances that are not chemically bonded together and can be separated by physical means, such as filtration or distillation. A pure substance, on the other hand, is a substance that is made up of only one type of atom or molecule and cannot be separated by physical means. Examples of mixtures include saltwater and air, while examples of pure substances include elements like gold and compounds like water. **

Pure metals are metallic elements that are composed of only one type of atom. They have a simple atomic structure with atoms arranged in a regular pattern, allowing for high electrical and thermal conductivity. Pure metals are typically soft and malleable, making them easy to shape and form into various products. Examples of pure metals include gold, silver, and copper. **