I

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• Magnitude of the principal stresses controls (or governs) the degree of birefringence.

• Covalent bonds are responsible for atomic combinations in many elements.

• ? is the angle defining the position of the rotor with respect to the stator.

• These elements define the geometry of the orbit.

• The take-off condition dictates (or determines, or defines) the amount of wing area required for an airplane.

• The armature of the rudder motor dictates the direction in which the rudder motor rotates.

• The rate at which a furnace can melt scrap governs the rate at which it can accommodate successive portions of the charge.

• These equations govern simple waves.

• It is the naval architect who settles (or decides on) the form of the vessel.

• Three points determine a circle.

• The geometry of the small ring compounds fixes their configuration.

• The equation specifies the topography of the potential surface.

II

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• These variables are difficult to appraise accurately.

• The cost of steam generation required by the power plant can be arrived at (or defined) from Fig. 2.

• A number of coils were rolled to assess the performance of the controller.

• The pressure was determined (or deduced) from the weight of steam and ...

• Reserves are estimated (or evaluated) at 100,000,000 bbl.

• To assess the distribution and level of the pollutant ...

• This knowledge enables the analyst to gauge the meaning and reliability of the results obtained.

• Information about temperatures below the surface can be inferred from the magnetic properties of rocks.

• The adequacy of the global supply can be gauged through a simple analysis of the per capita need for water.

III

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IV

• If the wavelength composition of the light is known, its colour can be specified (or determined, or identified).

• Identify the two chemicals in the equation for which ...

• The closer you want to pinpoint the exact orbit, the more corrections you must make.

• It is convenient to define the relief angle in terms of the angle between the flank and a plane perpendicular to the drill axis.

• The mobility ? is defined as the average drift velocity when E1 = 1.