![subject](/tpl/images/cats/fizika.png)
Physics, 06.05.2020 08:33 strange5eyes
When a high-power laser is used in the Earth's atmosphere, the electric field associated with the laser beam can ionize the air, turning it into a conducting plasma that reflects the laser light. In dry air at 0Β°C and 1 atm, electric breakdown occurs for fields with amplitudes above about 3.00 MV/m.
(a) What laser beam intensity will produce such a field?
W/m2
(b) At this maximum intensity, what power can be delivered in a cylindrical beam of diameter 3.44 mm?
W
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 23:30
Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 10:30
You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 12:30
An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 17:30
Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.
Answers: 3
You know the right answer?
When a high-power laser is used in the Earth's atmosphere, the electric field associated with the la...
Questions
![question](/tpl/images/cats/nemec.png)
German, 19.02.2021 14:00
![question](/tpl/images/cats/istoriya.png)
History, 19.02.2021 14:00
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 19.02.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 19.02.2021 14:00
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
English, 19.02.2021 14:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
English, 19.02.2021 14:00
![question](/tpl/images/cats/istoriya.png)
History, 19.02.2021 14:00
![question](/tpl/images/cats/mkx.png)
Arts, 19.02.2021 14:00
![question](/tpl/images/cats/himiya.png)
Chemistry, 19.02.2021 14:00
![question](/tpl/images/cats/geografiya.png)
Geography, 19.02.2021 14:00
![question](/tpl/images/cats/biologiya.png)
Biology, 19.02.2021 14:00
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 19.02.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 19.02.2021 14:00
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 19.02.2021 14:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 19.02.2021 14:00