A radome is to be designed for the nose of an aircraft to protect an X-band weather radar operating between 8.5 and 10.3 GHz. A new type of foam material with r = 2 (assume lossless and nonmagnetic) is chosen for the design. Assuming a flat, planar surface, determine the minimum thickness of the foam that will give no reflections at the center frequency of the band

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

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?

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length