An infinite straight wire with radius r carries a current i uniformly distributed over its cross section. the magnetic field at a distance d from the axis of the wire is b. what is the magnetic field a distance 2d from the axis of the wire? both points are inside (2d < r) the wire.(a) both fields are zero.(b) b(c) b/2(d) 2b(e) b/4(f) 4b

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit. explain why the pneumatic piston stumbles when it hits an obstacle.

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?