Equipotential lines are always perpendicular to field lines because the electric field is always perpendicular to the equipotential surface. This is because the electric field is the gradient of the electric potential, and the gradient is always perpendicular to the equipotential surface. Therefore, the equipotential lines, which represent points of equal electric potential, must be perpendicular to the electric field lines. This relationship ensures that work done in moving a charge along an equipotential line is zero, as the electric field does no work in a direction perpendicular to its field lines. **

Show lines and working lines in dogs differ primarily in their breeding purpose and physical characteristics. Show lines are bred for conformation to breed standards and are often selected for their appearance in dog shows. Working lines, on the other hand, are bred for their ability to perform specific tasks such as herding, hunting, or protection work. Working lines tend to have a higher drive, energy level, and intelligence compared to show lines, as they are bred for their working abilities rather than their appearance. Additionally, working lines may have a more athletic build and higher stamina to excel in their designated tasks. **

Fashion jewelry can stain if it comes into contact with certain substances such as water, sweat, perfume, lotion, or other chemicals. The metal in fashion jewelry can react with these substances and cause discoloration or staining. To prevent staining, it's important to remove fashion jewelry before swimming, exercising, or applying lotions or perfumes. Additionally, storing fashion jewelry in a dry and clean environment can help prevent staining. **

Yes, Swarovski is considered fashion jewelry. Swarovski is known for its high-quality crystal jewelry and accessories that are often used to add sparkle and elegance to fashion ensembles. The brand offers a wide range of jewelry pieces, including necklaces, earrings, bracelets, and rings, that are designed to complement various fashion styles and trends. Many people consider Swarovski jewelry to be a fashionable and stylish choice for accessorizing different outfits. **

Bikini lines are a natural and normal part of the body and are not inherently bad. However, some people may feel self-conscious about their bikini lines and choose to remove or groom the hair in that area. Ultimately, whether or not bikini lines are considered "bad" is subjective and varies from person to person. It's important to remember that everyone's body is unique and there is no right or wrong way for a bikini line to look. **

Scratched lines are marks or grooves that have been made by scraping or cutting a surface with a sharp object. These lines can be intentional, such as in the case of an artist using a sharp tool to create texture in a drawing, or they can be accidental, such as when a surface is scratched by a sharp object. Scratched lines can vary in depth and width, and they can be used for decorative, functional, or destructive purposes. **

Panty lines are not necessarily prohibited, but they are generally considered undesirable in certain situations, such as when wearing tight or form-fitting clothing. Many people prefer to avoid visible panty lines for a smoother and more polished look. There are various undergarment options, such as thongs or seamless panties, that can help prevent panty lines from showing. Ultimately, the decision to avoid panty lines is a personal preference and depends on the individual's comfort and style choices. **

Palm lines are the lines and creases on the palm of the hand that are used in palmistry to interpret a person's character, personality, and future. The three major lines are the heart line, the head line, and the life line, and they are believed to provide insight into a person's emotional, mental, and physical well-being. Palm lines are thought to be unique to each individual and can change over time, reflecting the changes in a person's life and experiences. **