Physics, 25.09.2021 08:50 ansuaprajita1506
The Sun's radiation comes to Earth as many different wavelengths of electromagnetic
energy. One form of energy is ultraviolet radiation. A person's overexposure to the Sun's
ultraviolet radiation (UV rays) is the biggest risk factor for skin cancer. Some ultraviolet
radiation is absorbed by the ozone layer, which is located in Earth's atmosphere. This ozone
layer provides a natural protection for living organisms.
State one reason why all of the ultraviolet radiation coming toward Earth does not reach Earth's surface.
Answers: 1
Physics, 23.06.2019 02:40
An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22Ā°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)
Answers: 1
Physics, 23.06.2019 09:00
If a person whirls an object horizontally in a counter clockwise direction and the string breaks at point p as shown, what path will the rock follow?
Answers: 2
Physics, 23.06.2019 15:10
Which type of heating system is often used to heat many buildings from a central location
Answers: 3
Physics, 23.06.2019 17:30
During the refrigeration cycle, what does the refrigerant do? absorbs and releases thermal energy by first vaporizing then condensing. absorbs and releases thermal energy by first condensing then vaporizing. insulates the thermal energy away from the cooling area. transfers thermal energy to the cooling area by condensing.
Answers: 1
The Sun's radiation comes to Earth as many different wavelengths of electromagnetic
energy. One fo...
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