Answers: 2
Physics, 22.06.2019 22:50, mdg5605
The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?
Answers: 3
Which statement is not true about electrons? electrons have a negative charge. the orbit of electro...
Mathematics, 14.10.2020 17:01
Mathematics, 14.10.2020 17:01
Mathematics, 14.10.2020 17:01
Mathematics, 14.10.2020 17:01
Mathematics, 14.10.2020 17:01
Mathematics, 14.10.2020 17:01
History, 14.10.2020 17:01