Category: Engineering

What is the advantage of having gills attached to the legs in the crayfish? Each gill has blood vessels running through it and is feathery in nature, providing a large surface area for absorbing larger amounts of oxygen from the water. Move the walking legs and notice what happens to the gills. 16. Are male […]

How many wildlife are there in Singapore? Singapore has an estimated 23,000–28,000 species of terrestrial organisms and 12,000–17,000 marine organisms, making up over 40,000 kinds of non-microbial organisms. What kind of animals live in Singapore? What Animals Live In Singapore? Indo-Pacific Bottlenose Dolphin. Leopard Cat. Banded Surili. Dugong. Reticulated Python. Sunda Pangolin. Crab-eating Macaque. Colugos. […]

How do you get permanent marker off a mailbox? Gently rub a bit of toothpaste onto the stain with your finger and then use a wet rag to gently rub the stain away. In addition, some have had success using an Aerosol Hairspray by spraying the spot and then wiping away. Finally, some have also […]

How long does it take for baking soda to whiten teeth? Because baking soda removes discoloration from the surface of your teeth, it won’t remove deeper stains. According to the Mayo Clinic, toothpaste containing baking soda can help coffee and smoking stains, and it could take between two to six weeks for you to notice […]

Is Princess Peach a bad guy? Let’s be honest, Princess Peach is a terrible ruler. She is a bad friend, an even worse girlfriend, and one of the most irritating enemies that one can play against in Smash. She has been a thorn in our side since her first appearance and as time has gone […]

Is all rubber toxic? While rubber includes some natural rubber (called latex) from rubber trees, it also contains phthalates (chemicals that affect hormones, see Phthalates and Children’s Products), polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs) and other chemicals known or suspected to cause adverse health … Does recycled rubber cause cancer? After examining the […]

Why does salt make gummy bears shrink? in salt water, what happens? because there are more salt molecules in the salt water than in the Gummy Bear. The Gummy Bear grows shrinks! Why do gummy bears shrink? In Salt and Sugar: The water will move out of the gummy bear to the sugar and salt […]

What are the most common injuries due to electrical hazards? Electrical burns are the most common shock-related, nonfatal injury. They occur when a worker contacts energized electrical wiring or equipment. Although electrical burns can occur anywhere on the body, they most often occur on the hands and feet. Which of the following is an example […]

Are Amtrak employees federal employees? The National Railroad Passenger Corporation (Amtrak) is a government-owned corporation established in 1971 to provide intercity passenger train service throughout the United States. Between 1920 and 1970, private passenger rail services in the United States were in an advanced state of decline. Do Amtrak employees get free travel? Rail Pass […]

Does your face change after braces? Yes, undergoing orthodontic treatment can bring changes to a person’s face. Don’t worry though – the changes that braces will make are purely positive! Braces will fix alignment issues with your face and give you a more symmetrical, natural look to both your mouth and your jawline. What should […]