Note: If 1/2-inch panel board is used inside and out, or 5/8-inch one side and 3/8-inch the other, and 1/8-inch glass is used, stock lumber in Af, Af, and Af can be used in making the glass panels.

If the glass is damaged, atmospheric pressure can collapse the vacuum tube into dangerous fragments which accelerate inward and then spray at high speed in all directions.

If later heat treatments cause this glass to become partly crystalline, the resulting material is known as a glass-ceramic, widely used as cooktop.

If an evacuated glass tube is equipped with two electrodes and a voltage is applied, the glass opposite of the negative electrode is observed to glow, due to electrons emitted from and travelling perpendicular to the cathode ( the electrode connected to the negative terminal of the voltage supply ).

If a person's hands are placed around the glass without touching it, the vanes will turn slowly or not at all, but if the glass is touched to warm it quickly, they will turn more noticeably.

If the glass is cooled quickly in the absence of a strong light source by putting ice on the glass or placing it in the freezer with the door almost closed, it turns backwards ( i. e. the silver sides trail ).

If a similar ball is charged by the same glass rod, it is found to repel the first: the charge acts to force the two balls apart.

If a second piece of glass be rubbed with a second piece of resin, and if the piece be then separated and suspended in the neighbourhood of the former pieces of glass and resin, it may be observed:

If a body electrified in any manner whatever behaves as the glass does, that is, if it repels the glass and attracts the resin, the body is said to be ' vitreously ' electrified, and if it attracts the glass and repels the resin it is said to be ' resinously ' electrified.

If shots are taken out of sequence, as is often the case, he will be alert to make sure that that beer glass is in the appropriate state.

If the pane is not a good insulator ( such as a single pane window ), water vapour condenses on the glass forming patterns.

* If medieval glass has flowed perceptibly, then ancient Roman and Egyptian objects should have flowed proportionately more — but this is not observed.

If there is no cell attached to the glass, there will be no interference.

If the store is crammed with used athletic gear, old stereos, and old tools, the store owner must spend time and money shelving and sorting items, displaying them on different stands or in glass cases, and monitoring customers to prevent shoplifting.

If there are two horizons there is side error ; adjust the horizon glass / mirror until the stars merge into one image or the horizons are merged into one.

If for example, visible light were traveling through acrylic glass ( with an index of refraction of 1. 50 ) into air ( with an index of refraction of 1. 00 ), the calculation would give the critical angle for light from acrylic into air, which is

If the drain is opened and the tumbler is kept in position over the hole, the water in the tumbler drains out leaving the glass filled with air, and this then acts as the plug.

If this process happens faster than it is naturally quenched by ions recombining, the new ions multiply in successive cycles until the gas breaks down into a plasma and current flows freely in a discharge.

If the amount to be paid at time 0 ( now ) for all the future cash flows is known, then that amount can be substituted for DPV and the equation can be solved for i, that is the internal rate of return.

If the vocal folds are drawn apart, air flows between them causing no vibration, as in the production of voiceless consonants.

If the extra electrode ( also called a " plate " or " anode ") is made more positive than the hot filament, a direct current flows through the vacuum to the anode ( a demonstration of the Edison effect ).

If a purely resistive load is connected to a power supply, current and voltage will change polarity in step, the power factor will be unity ( 1 ), and the electrical energy flows in a single direction across the network in each cycle.

If an investment may be given by the sequence of cash flows

If this should happen, parts of Pierce County and the Puyallup Valley would be at risk from lahars, lava, or pyroclastic flows.

If a fluid is flowing in some area, and we wish to know how much fluid flows out of a certain region within that area, then we need to add up the sources inside the region and subtract the sinks.

If the two flows are not equal, for example if heat is being transferred from water to air or vice-versa, then, similar to concurrent exchange systems, a variation in the gradient is expected because of a buildup of the property not being transferred properly.

If production flows perfectly then there is no inventory ; if customer valued features are the only ones produced, then product design is simplified and effort is only expended on features the customer values.

If we additionally assume that the image plane is perpendicular to the ground plane ( an imaginary plane Tangential to the surface of the Earth ), and that the waterfall flows on a plane that is parallel to the image plane, we can estimate the height by measuring the vertical separation of waterfall head and base in

If a confined aquifer follows a downward grade from its recharge zone, groundwater can become pressurized as it flows.

If a coil is made using coaxial cable near to the feed point of a balanced antenna, then the RF current that flows on the outer surface of the coaxial cable can be attenuated.

If the mintmark on the die is filled, plugging up the cavity into which the planchet's metal flows under the pressure of the strike, the mintmark will be weak or invisible.

If the plasma is not fully ionized but contains ions that fluoresce, laser-induced fluorescence can provide very detailed information on temperature, density, and flows.

If it is sensed that the upper limit is being reached, the dominating flows will be identified and encouraged to back off by artificially restraining them.

If the water flows through the navigation channel, which is maintained by the U. S. Army Corps of Engineers, the time the water remains in the lake is about two days.

If the source is hotter than the destination heat flows with a low thermal resistance towards the destination.

If the river flows into a glacial lake, the lake may appear turquoise in color as a result.

If so, the transmitter encrypts the data to prevent eavesdropping as it flows to the receiver.

If the hydraulic pump and / or hydraulic motor make use of the hydrodynamic effects of the fluid flow, i. e. pressure due to a change in the fluid's momentum as it flows through vanes in a turbine.

If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit.

If the flow in the AVM is in the other direction, portal venous blood flows directly into the veins rather than running through the liver ; this may lead to hepatic encephalopathy ( confusion due to portal waste products irritating the brain ).

If the helictite has a very thin central tube where the water flows like it does in straws, capillary forces would be able to transport water against gravity.