A 20.0m -long cable consists of a solid-inner, cylindrical, nickel core 11.0cm in diameter surrounded by a solid-outer cylindrical shell of copper 11.0cm in inside diameter and 22.0cm in outside diameter. The resistivity of nickel is 7.8*10^-8 ohm*m. What is the resistance of this cable? If we think of this cable as a single material, what is its equivalent resistivity?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin