No, efficiency cannot be zero. Efficiency is a measure of how well a system or process uses inputs to produce outputs, and it is always a positive value between 0 and 1. A value of zero would indicate that no useful work is being done, which is not possible in a functioning system. If a system is not producing any useful output, its efficiency would be close to zero but not exactly zero. **

Yes, contact lenses can twist or rotate on the eye. This can happen due to factors such as blinking, rubbing the eyes, or improper placement of the lens. If you experience discomfort or blurry vision while wearing contact lenses, it is important to check if the lens has twisted and reposition it if necessary. Twisting of contact lenses can also occur if the lens is not properly fitted or if the prescription is incorrect. **

No, the lower limit of integration is not always zero. The lower limit of integration represents the starting point of the interval over which the integration is performed. This starting point can be any real number, positive or negative, depending on the specific problem or function being integrated. In some cases, the lower limit of integration may be a negative number or a non-zero positive number. **

It is possible that the pain could have been caused by a stomach twist, also known as gastric volvulus, which is a rare condition where the stomach twists on itself. This can lead to severe pain and requires immediate medical attention. On the other hand, a half twist could refer to a less severe condition like indigestion or gas, which can also cause abdominal discomfort but is usually not as serious. It is important to consult a healthcare professional to determine the exact cause of the pain. **

Bejeweled Twist may not work due to various reasons such as compatibility issues with the device or operating system, corrupted game files, insufficient system requirements, or conflicts with other software or applications running on the device. It is recommended to check for updates, ensure that the system meets the game's requirements, and try troubleshooting steps such as reinstalling the game or updating device drivers to resolve any issues. **

The foot twisted due to a sudden and forceful movement that caused the ligaments and tendons in the foot to stretch or tear. This can happen during activities such as running, jumping, or changing direction quickly. The twisting motion puts stress on the foot and can result in a sprain or other injury. **

T-shirts twist because of the way they are cut and sewn. The fabric of a T-shirt is often cut on a bias, which means it is cut at a 45-degree angle to the grain of the fabric. This bias cut can cause the fabric to stretch and distort, leading to twisting. Additionally, the way the T-shirt is sewn together can also contribute to twisting, especially if the seams are not aligned properly. **

The axolotl twists its body by flexing its long, slender torso and using its powerful tail to propel itself through the water. It moves with a sinuous, serpentine motion, allowing it to navigate through its aquatic environment with agility and grace. This twisting movement enables the axolotl to hunt for prey, evade predators, and explore its surroundings in its natural habitat. **