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Hace 3 días · A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial.
18 de may. de 2024 · The equator, at 0° latitude, receives a maximum intensity of the sun’s rays all year. This means that areas near the Earth’s equator experience relatively constant sunlight and little variation during the solstices. Why is the Sun stronger in Europe? The Sun’s strength is not determined by the location itself but rather by latitude.
Hace 17 horas · The spectrum of sunlight has approximately the spectrum of a black-body radiating at 5,777 K (5,504 °C; 9,939 °F), interspersed with atomic absorption lines from the tenuous layers above the photosphere.
30 de abr. de 2024 · Last updated 30th April 2024. Without intervals, we wouldn’t have melody, chords, or scales. They really are one of the foundations of music. In this guide to music intervals, we’re going to cover what intervals are in music as well as all the different ways to categorize them and name them.
16 de may. de 2024 · So how much sunlight do you really need? Well, it depends on several factors. Generally, most experts recommend 5-30 minutes of sunlight at least twice a week. However, getting sunlight does...
Hace 6 días · My new Sunnto Race is very hard to read in bright sunlight when the screen dims. I am an 800m runner and often do grass repeats and track intervals. The problem is, when I glance down at the watch to check my splits (for example every 200m) it is too dim to read and I must hold my left arm up for more than a single stride (I run around 85-95 strides/minute) for it to brighten the screen.
Hace 2 días · Exposure to solar ultraviolet (UV) radiation and use of UV-emitting tanning devices are known risk factors for skin cancer. Few studies have explored the interaction between these risk factors, namely how the risk of skin cancer increases among those who both have been exposed to high levels of natural sunlight and regularly use tanning beds. Nurses’ Health Study II followed 116,430 women ...
