The minimum intensity of a physical stimulus that can just be detected by an observer is called

Answer;

-Absolute threshold

Absolute threshold is the minimum intensity of a physical stimulus that can just be detected by an observer.

Explanation;

An absolute threshold is the smallest level of stimulus that can be detected, usually defined as at least half the time.

-It can be applied to any stimulus that can be detected by the human senses including sound, touch, taste, sight, and smell. For example, in an experiment on sound detention, researchers may present a sound with varying levels of volume. The smallest level that a participant is able to hear is the absolute threshold.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds