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Heat lightning (not to be confused with dry thunderstorms, which are also often called dry lightning) is a misnomer [1] used for the faint flashes of lightning on the horizon or other clouds from distant thunderstorms that do not appear to have accompanying sounds of thunder.
With humid heat, the moisture in the air can prevent the evaporation of sweat. [21] Regardless of acclimatization, humid heat poses a far greater threat than dry heat; humans cannot carry out physical outdoor activities at any temperature above 32 °C (90 °F) when the ambient humidity is greater than 95%.
Simplified control circuit of human thermoregulation. [8]The core temperature of a human is regulated and stabilized primarily by the hypothalamus, a region of the brain linking the endocrine system to the nervous system, [9] and more specifically by the anterior hypothalamic nucleus and the adjacent preoptic area regions of the hypothalamus.
As much of the Northern Hemisphere continues to bake in a year of unprecedented heat waves linked to climate change, one paradoxical consequence of rising global temperatures is that some areas of ...
Therefore, the sunbeam hitting the ground at a 30° angle spreads the same amount of light over twice as much area (if we imagine the Sun shining from the south at noon, the north–south width doubles; the east–west width does not). Consequently, the amount of light falling on each square mile is only half as much. Figure 3
The heat distortion temperature is determined by the following test procedure outlined in ASTM D648. The test specimen is loaded in three-point bending in the edgewise direction. The outer fiber stress used for testing is either 0.455 MPa or 1.82 MPa, and the temperature is increased at 2 °C/min until the specimen deflects 0.25 mm.
The warmest destinations in Europe: most popular places to enjoy the sun this winter. Europe is known for its cold climate in many regions during the winter season, but there are still plenty of ...
Rapid cold hardening (RCH), one of the fastest cold temperature responses recorded, [9] allows an insect to quickly adapt to severe weather change without compromising function. Drosophila melanogaster (the common fruit fly) is a frequently experimented insect involving cold hardening. An example of RCH enhancing organisms' performance comes ...