Problem: Electric charge is a physical property. It occurs between particles or objects. It causes them to attract or repel each other. They do not even have to touch. This is unlike the typical push or pull you may be familiar with. All electric charge is based on the protons and electrons in atoms. A proton has a positive electric charge. An electron has a negative electric charge. Forces on Charged Objects Most atoms are balanced electrically. They have the same number of positive and negative charges. Therefore, the number of protons equals the number of electrons. Neutrons do not matter as they have no charge. When an object loses some electrons, it becomes positively charged. There are now more protons than electrons inside the atom. The lost electrons may remain free. Or, they may attach to another object. The new object now has more electrons than protons. It then becomes negatively charged.

Question: "How will increasing neutrons affect the particle's charge?"

Answer: "Neutrons do not affect the particle's charge?"
Answer: yes

Problem: The next evening, she arrived with a stack of glistening stopboxes containing sushi, sashimi, oysters in their shells, and Terran vegetables fresh plucked from their hydroponic beds. Wondering about the reason for her extravagance, I asked how work had gone that day. "Emil came in. He's taking Dream's End." "Emil?" "You've no memory left, old one. Emil Malaquez." You did that to test my affections." "What?" "Calling him by his first name. I did that in a comedy once.'Nights with Karl and Groucho.' It was before your time." "The critics liked it." "I'm glad." A moment later: "That's not why I called him 'Emil'." "No. We lunched together. He's nice."

Question: "Who is wondering about the extravagance and what did think was being tested?"

Answer: "The old one"
Answer: yes

Problem: Earths magnetic field helps protect Earth and its organisms. It protects us from harmful particles given off by the sun. Most of the particles are attracted to the north and south magnetic poles. This is where Earths magnetic field is strongest. This is also where relatively few organisms live. Another benefit of Earths magnetic field is its use for navigation. People use compasses to detect Earths magnetic north pole. Knowing this helps them tell direction. Many animals have natural 'compasses' that work just as well. Birds like the garden warbler in Figure 1.36 use Earths magnetic field. They use it to guide their annual migrations. Recent research suggests that warblers and other migrating birds have structures in their eyes. These structures let them see Earths magnetic field as a visual pattern.

Question: "Where is Earths magnetic field strongest?"

Answer: "South magnetic pole"
Answer:
no