Your waste management system can be energy efficient through the reuse of the different energy sources that are present in the whole system. If these resources are then efficiently being used up in the whole waste management system, we can safely say that we have an energy efficient system.
Answer:
The unknown radioactive element is present in pitchblende.
Explanation:
Marie Curie was the scientists that mainly worked on the radioactive element. She was the first scientist who won the noble prize in two different fields of science.
The pitchblende was the mineral sample that was noticed by Marie curie during her experiment. Pitchblende contains a more radioactive element that uranium and confirms that she had found a new element.The new element was polonium with hundred times more radioactive than uranium.
Thus, the answer is unknown radioactive element is present in pitchblende.
The cervix is located at the bottom of the uterus and must dilate 8cm during childbirth
I believe the answer is - Visual, manual, and cognitive
