Radiografic inspections.
what is the radiation contrast for lead if two thicknesses of 8.4 mm and 8.8 mm are used to measure it? assume that the attenuation constant for lead is 3.5 cm-1 and the build up factor is 2.0.
a characteristic curve for a particular brand of film shows the following values. what is the gradient, g, of this film?
optical density exposure/mgray
d1 = 1.6 k1 = 2.5 mg
d2 = 4.0 k2 = 4.3 mg
a film with a gradient of 12 has the following values. what would the exposure be at k2?
optical density exposure/mgray
d1 = 1.6 k1 = 2.5 mg
d2 = 4.1 k2 = ? mg

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.