Adisk of radius r produces a potential v = 64.4 mv at the center of the disk at point p, as shown. assume that charge density varies linearly with the radius according to ïƒ = ar, where a = 7.55 ã— 10-10 c/m3. calculate the radius of the disk in centimeters.

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false