Cup sinks

Flush-mounted cup sinks are commonly used to receive small to moderate amoimts of water. These are often made of polyethylene. They can be made from 3-inch PVC pipe cemented in flush with the countertop. A reducing adapter will bring the diameter down to the standard drain pipe size. 

Some chemical fume hoods have a small cup sink located inside the cabinet. Water should be run into this sink periodically to maintain it free of obstruction and to keep the P-trap full and thereby prevent sewer gas back up. 

It is imperative to prevent the discharge of chemicals into the cup sink. 

Polystyrene is a common polymer used to make Styrofoam containers, packing peanuts, and insulation. Another kind of packing peanut used is made of starch. Place about a cup of acetone in a glass container. Acetone is available wherever paint is sold. Do this in a well-ventilated area. Be careful with the acetone, it can remove paint and ruin finishes. Add a starch packing peanut to the acetone and then a Styrofoam packing peanut. The starch peanut will not dissolve, but the polystyrene peanut will. Dilute the acetone with ample amounts of water before disposing down the sink. 

Hold some room-temperature water in the cupped palm of your hand over a sink. Pour an equal amount of room-temperature rubbing alcohol into the water. Is this mixing an exothermic or endothermic process What s going on at the molecular level ... 

Bathroom sink activities Turn on your bathroom sink faucet to a typical flow rate and measure the number of seconds it takes to fill the measuring cup. (Recall that 500 milliliters equals 0.5 liter.) Log... 

Cover the small hole of one of the cups with your finger. While holding the cup over the sink add about one-quarter cup of water to it. Rub the covered plastic ballpoint pen in your hair or on a sweater for about thirty seconds. Uncover the hole to allow a stream of water to flow. Move the middle of the ballpoint pen close to the thin stream of water, but do not touch the stream. 

Sprinkle one-and-a-half cups of baking soda evenly over the bottom of the kitchen sink. Pour two cups of vinegar on the baking soda. Blow soap bubbles into the sink. 

Put one-fourth cup of baking soda in the sink. Add one-half cup of vinegar to the baking soda. Is enough carbon dioxide gas made to float soap bubbles ... 

Tear several cabbage leaves into pieces about the size of your thumb. Put one cup of the cabbage pieces into a bowl. Use hot water from the sink faucet to fill a measuring cup. Add four cups of hot water to the bowl. Let the leaves sit in the water until the water turns dark purple. This should take about fifteen minutes. When the water is no longer hot, squeeze the leaves with your fingers to remove more of the color. 

Figure 1 -5 Diagram of a small sink. The faucet can be placed on the back wall or on either end. Pegs on the side, as shown, or splash wall behind can be used to dry measuring cups and small utensils.

She busied herself at the sink, rinsing cups. Just coincidence, I expect. ... 

Ceramic materials, after all, seemed more at home in a pottery class or factory. The stuff of bricks and drainpipes, of bathtubs, sinks, and toilet bowls, of cups and plates, these earthy compounds, especially clay, were useful but too ordinary and familiar to interest Ph.D.s tinkering about with differential scanning calorimetry instruments or scrutinizing the partial penetration of flux. Furthermore, the majority of ceramics are insulators, not conductors, and are so used on high-voltage electrical transmission lines. 

Zooplankton actively swimming into sediment traps also serve as a source of error in flux measurements. It is impossible to differentiate these swimmers from zooplankton that have settled passively into the cup as part of the sinking POM flux. Swimmers may constitute as much as a quarter of the POC collected by the trap (Steinberg et al, 1998) and are generally removed from trap material prior to analysis. This introduces minimal error into the trap estimates of POC flux, as detrital zooplankton likely only comprise... 

THELMA is a housewife. It s morning and she is slamming coffee cups from the breakfast table into the kitchen sink, which is full of dirty breakfast dishes and some stuff left from last night s dinner which had to soak. The TV is ON in the b.g. Prom the kitchen, we can see an incomplete wallpapering project going on in the dining room, an obvious do-it-yourself attempt by Thelma. 

Figure 5.18 shows schematically the flow in an open channel, which passes over a sharp-edged weir. You can study a very similar flow in the kitchen sink by pouring water out of a pot or a cup, at a high enough velocity that the flow does not dribble down the side of the pot or cup, but rather flows freely away from the edge, as shown in Fig. 5,18. The flow over the weir in Fig. 5.18,is much simpler than the flow out of a cup, because the weir is assumed to be straight an ld to extend a long way into and out of the page, so the complications where it meets the walls of the channel and the complications due to the curvature of the cup or pot can be ignored.

Figure 14 Isothermal displacement calorimeter with cooling module. A, stainless-steel support tube, B, vent tube C, current and potential leads for heater D, connector for feed tube E, Teflon plug F, vent plug G, heateriwire supports H, baffles I, Teflon support ], heater wires K, stirrer magnet L, stirrer paddle A,feed tube N, thermistor P, Teflon feed cup Q, water inlet tube R, copper heat sink S, 5Q era precision-bore Dewar flask T, 0-rings U, coin-silver cooling rod V, copper cup W, coin-silver support rods X, copper heat shield Y, coin-silver bar Z, cooling module (Reproduced by permission from J. them, and Eng. Data, 1966, 11, 189)...

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