Answer : 1
Correct Answer: vacuumThe speed of light in vacuum, commonly denoted c, is a universal physical constant important ... The finite speed of light also limits the theoretical maximum speed of computers, since information must be sent ....Read more
Correct Answer: Vitamin DExposure to the sun's ultraviolet (UV) rays is required for vitamin D3(cholecalciferol) to be produced. Vitamin D3 is synthesized in the skin once your unprotected skin receives exposure to sunli...Read more
Correct Answer: Excretory systemThe Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney ...Read more