Answer:
In this experiment, different solutions are made by mixing water with different colors and amounts of food coloring. Students should notice that once the water and colors are mixed together, the liquid looks the same throughout. It is a solution—a homogeneous mixture
Explanation:
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Answer:
Today, the vast majority of us multitask while using our smartphones. We play games, email, surf social media, text, and use apps and other functions while watching television, eating, doing work, or while "engaged" in a conversation with another person. Multitasking has become such a regular part of our lives that most of us believe we do it well—and few imagine it could actually be dangerous.
Explanation:
1. Multitasking is associated with harm to our brains.
2. Multitasking can lead to memory problems.
3. Multitasking can lead to increased distractibility.
4. Multitasking can make us walk into traffic.
5. Multitasking hurts your grades and the grades of those around you.
6. Multitasking can lead to falling and breaking bones.
7. Multitasking can harm your relationship.
8. Multitasking increases chronic stress.
9. Multitasking increases depression and social anxiety.
10. Multitasking makes you less productive and less efficient.
Answer:
Option D
Explanation:
Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. Alpha particles consist of two protons and two neutrons, so they are positively charged. In Rutherford's experiments most of the alpha particles passed straight through the foil without being deflected. However, occasionally the alpha particles were deflected in their paths, and rarely the alpha particles were deflected backward at a 180 degree angle.
Since like charges repel, Rutherford concluded that the cause of the deflections of the positively charged alpha particles had to be something within the atom that was also positively charged. Rutherford concluded from his metal foil experiments that most of an atom is empty space with a tiny, dense, positively charged nucleus at the center that contains most of the mass of the atom.