When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When problems with poor control at high speed were first encountered, they were addressed by designing a new style of control surface with more power.

When dry, acrylic paint is generally non-removable from a solid surface.

When surface to air missiles became capable of hitting high flying aircraft bombers, bombers used flight at low altitude to evade radar detection.

When evaluating a coin, the following — often subjective — factors may be considered: 1 ) " eye appeal " or the aesthetic interest of the coin ; 2 ) dents on the rim ; 3 ) unsightly scratches or other blemishes on the surface of the coin ; 4 ) luster ; 5 ) toning ; 6 ) level of detail retained, where a coin with full details obviously is valued higher than one with worn details.

When metal ions are reduced from ionic solution, they form a pure metal surface on the cathode.

When particles in a beam are thrown against a foil made of a certain substance, the cross section is a hypothetical area measure around the target particles of the substance ( usually its atoms ) that represents a surface.

When the angle θ does not satisfy the above condition, the horizontal component of force exerted by the road does not provide the correct centripetal force, and an additional frictional force tangential to the road surface is called upon to provide the difference.

When the magma approaches the surface of the Earth, the rapid off-loading of overlying material causes the trapped gases to decompress rapidly, thus triggering explosive destruction of the magma and spreading volcanic ash over wide areas.

When EM radiation at the frequences for which it is referred to as " radio waves " impinges upon a conductor, it couples to the conductor, travels along it, and induces an electric current on the surface of the conductor by moving the electrons of the conducting material in correlated bunches of charge.

When the umbra does not reach the surface of the Earth, the Sun is only partially occulted, resulting in an annular eclipse.

When wet, the oil tends to float to the surface of the roads making them very slippery and dangerous.

When swimming, the thorax would be weighed down by the front legs, making it difficult for the animal to move its neck and legs in harmony or keep its head above the surface.

When the cannon was fired through the touchhole, turbulence from the initial surface combustion caused the rest of the powder to be rapidly exposed to the flame.

When the stone hits the surface of the water, a circular pattern of waves appears.

When jewelry containing diamonds is heated ( for repairs ) the diamond should be protected with boracic acid ; otherwise the diamond ( which is pure carbon ) could be burned on the surface or even burned completely up.

When jewelry containing sapphires or rubies is heated, it should not be coated with boracic acid or any other substance, as this can etch the surface ; they do not have to be " protected " like a diamond.

When using an injection port, the syringe needle always stays above the surface of the skin, thus reducing the number of skin punctures associated with intensive insulinotheraphy.

When issues were thoroughly vetted, then the best ideas would bubble to the surface.

When a key is pressed, the foil tightly clings to the surface of the PC board, forming a daisy chain of two capacitors between contact pads and itself separated with thin soldermask, and thus " shorting " the contact pads with an easily detectable drop of capacitive reactance between them.

When cut open, lithium exhibits a metallic luster, but contact with moist air corrodes the surface quickly to a dull silvery gray, then black tarnish.

When depictions of lesbians began to surface, they were often one-dimensional, simplified stereotypes.

When this angle is exceeded, photons no longer penetrate the semiconductor but are instead reflected both internally inside the semiconductor crystal and externally off the surface of the crystal as if it were a mirror.

When full, a notable phenomenon is that around midday the lake surface can often become very flat.

When ice forms on the beds, trucks can be driven onto the ice to spread a thin layer of sand that helps to control pests and rejuvenate the vines.

* When the metal atoms are hexagonal close packed, ( hcp ), as the octahedral interstices lie directly opposite each other on either side of the layer of metal atoms, filling only one of these with carbon achieves 2: 1 stoichiometry with the CdI < sub > 2 </ sub > structure.

When the upper layer cooled so its density was greater than the lower layer, the waters mixed ( 1978 – 79 ).

When the hailstone moves into an area with a high concentration of water droplets, it captures the latter and acquires a translucent layer.

When the user pushes down at a particular position, their finger pushes the front layer down through the spacer layer to close a circuit at one of the intersections of the grid.

When no voltage is applied to a TN liquid crystal cell, polarized light passes through the 90-degrees twisted LC layer.

When physical chemist Richard Williams applied an electric field to a thin layer of a nematic liquid crystal at 125 ° C, he observed the formation of a regular pattern that he called domains ( now known as Williams Domains ).

When an electric field is applied to the LC layer, the long molecular axes tend to align parallel to the electric field thus gradually untwisting in the center of the liquid crystal layer.

When core convection does not occur, a helium-rich core develops surrounded by an outer layer of hydrogen.

When extended indefinitely, a layer of hexagonal boron nitride, BN, is obtained, with a structure identical to that of graphene apart from the alternation between boron and nitrogen in each ring.

When a layer of shingles wears out, they are usually stripped, along with the underlay and roofing nails, allowing a new layer to be installed.

When stainless steel parts such as nuts and bolts are forced together, the oxide layer can be scraped off, causing the parts to weld together.

When it first forms, this protective layer is only 1 – 2 nm thick but continues to slowly grow ; reaching a thickness of 25 nm in four years.

When exposed to nitrogen clean titanium metal is covered with a titanium nitride layer.

When the client program on the destination computer receives them, the TCP layer ( Transport Layer ) reassembles the individual segments and ensures they are correctly ordered and error free as it streams them to an application.

When finely divided, it can react with cold water ; in air, uranium metal becomes coated with a dark layer of uranium oxide.

When a voltage is applied between the gate and body terminals, the electric field generated penetrates through the oxide and creates an " inversion layer " or " channel " at the semiconductor-insulator interface.

When a ground plane layer is present underneath, it forms a transmission line ( stripline ) with the trace.

When light is transmitted through a layer of magneto-optic material, the result is called the Faraday effect: the plane of polarization can be rotated, forming a Faraday rotator.

When identifying communication partners, the application layer determines the identity and availability of communication partners for an application with data to transmit.