Ch 28 hw exercise 28.10 8 of 9 constants a short current element dl⃗ = (0.500 mm)j^ carries a current of 4.60 a in the same direction as dl⃗ . point p is located at r⃗ = ( -0.730 m)i^+ (0.390m)k^. part a find the magnetic field at p produced by this current element. enter the x, y, and z components of the magnetic field separated by commas. dbxd b x, dby, dbz = nothing t request answer provide feedback

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.