Ultimate Science Knowledge Quiz

Explanation
The time interval between two beats of a normal human heart is 1 second. This is because the average resting heart rate for adults is typically around 60-100 beats per minute, which translates to 1 beat per second. The heart contracts and relaxes in a rhythmic pattern, with each beat representing a complete cardiac cycle. Therefore, the correct answer is 1 sec.

Explanation
Carbon 14 (C-14) is the isotope of carbon used for radio carbon dating. This is because C-14 is a radioactive isotope that is present in the atmosphere and is incorporated into the carbon dioxide that plants consume during photosynthesis. When animals consume these plants, they also incorporate C-14 into their bodies. As C-14 is radioactive, it undergoes radioactive decay over time. By measuring the amount of C-14 remaining in a sample, scientists can determine the age of organic materials, such as fossils or artifacts, through a process called radio carbon dating.

Explanation
Liquid helium (He) can climb walls of the container in which it is kept because it is a superfluid. Superfluidity is a state of matter where the liquid can flow with zero viscosity, allowing it to climb walls and escape containers due to capillary action. This unique property of liquid helium is a result of its extremely low temperature, close to absolute zero.

Explanation
Thrombosis is the correct answer because it refers to the blockage of a blood vessel by a blood clot. This condition occurs when a clot forms in a blood vessel, obstructing the normal flow of blood. It can happen in any part of the body and can lead to serious complications if not treated promptly. Arteriosclerosis is the hardening and narrowing of the arteries, which can contribute to the development of thrombosis. Heart failure is a condition where the heart is unable to pump blood effectively, and embolism refers to the blockage of a blood vessel by a foreign substance, such as a blood clot that has traveled from another part of the body.

Explanation
If a person is injured by the shot of a gun and all the pellets are not removed, it may cause poisoning by lead. Lead is commonly used in the manufacturing of ammunition, including shotgun pellets. When a person is shot and the lead pellets remain in their body, they can release lead into the bloodstream, leading to lead poisoning. This can cause a range of symptoms, including abdominal pain, fatigue, and cognitive impairments. Lead poisoning is a serious condition that requires medical attention.