Physics, 27.10.2021 17:10 jilliandantuma84
Xác định điện trở nối đất của hệ thống nối đất gồm 4 cọc thép bọc đồng có đường kính mỗi cọc 16mm, mỗi cọc dài 2m, cọc bố trí thành dãy, chôn sâu 0.8m so với mặt đất, khoảng cách giữa hai cọc là 6m. Cáp liên kết giữa các cọc là cáp đồng trần tiết diện 50mm2. Điện trở suất của đất đo vào mùa khô
Answers: 3
Physics, 22.06.2019 10:50, dontcareanyonemo
The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)
Answers: 3
Physics, 23.06.2019 02:50, raekwonpowell10
Orque can be calculated by multiplying the force (n) applied at 90∘ to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n⋅m. if the force (at 90∘ to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?
Answers: 2
Physics, 23.06.2019 06:00, ShilohTheBoy
Aforklift raises a box above the floor and does 2,000 j of work. if the forklift motor consumes 3,000 j of electrical energy from the battery to raise the box, what is the efficiency of the lift?
Answers: 2
Physics, 23.06.2019 09:30, TheRunningPotatoe245
What would occur if the index of refraction of a material was less than n=1? the speed of light would increase to a speed larger than the maximum speed of light in a vacuum. the light wave would not bend at all though the material. the light wave would not be able to refract and would instead reflect off of the material. the speed of light would reduce to values close to 0 m/s.
Answers: 3
Xác định điện trở nối đất của hệ thống nối đất gồm 4 cọc thép bọc đồng có đường kính mỗi cọc 16mm, m...
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