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
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An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?
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When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?
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Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy
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In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?
Answers: 1
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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