Some gravitational arguments also suggest that the gravitational potential between two points in space, measured along an agreed " spatial " route, may depend on the amount of time that a test object takes to traverse the route ( dependence on initial velocity ).
42.
Take a known mass ( the international standard kilogram, I'm sure they wouldn't mind lending it to you for a few hours ! )-get it moving at a known speed ( easy to measure with high precision ) and whack it into your test object.
43.
If the test object ( model ) is to be placed at high angles of attack relative to the airstream ( i . e . at an attitude beyond the operating range of the model support mechanism ), a "'bent sting "'can be used, see figure.
44.
If you want to get into the finer nuances, you can discuss the difference between mass and weight; you can discuss the different effects that temperature and pressure have on volume of water and volume of the test object; and you can discuss sensitivity analysis and experimental error.
45.
Variations in the electrical conductivity and magnetic permeability of the test object, and the presence of defects causes a change in eddy current and a corresponding change in phase and amplitude that can be detected by measuring the impedance changes in the coil, which is a telltale sign of the presence of defects.
46.
The mesa is " flat bedrock of faultless Shinarump conglomerate " above the Virgin River valley, which allowed clearance for assessment of a longer flight trajectory up from the mesa and over the cliff for the test object ( e . g ., the anthropoid simulator-- dummy-- named " Hurricane Sam " ) onto
47.
It may just be really hard to make an easy-to-use kit that could test objects non-destructively using non-toxic chemicals-that's cheap, sufficiently sensitive, not TOO sensitive and easy to interpret, etc . Given the relatively small number you'd probably sell . . . you could easily imagine why they don't exist . talk ) 16 : 18, 27 December 2008 ( UTC)
