Read at the side of the graduated cylinder 相关知识点: 试题来源: 解析 B。解析:在使用量筒测量液体体积时,应该读取凹液面的底部对应的刻度。A选项读取凹液面顶部的刻度是错误的。C选项随机读取凹液面上的刻度是不准确的。D选项读取量筒侧面是错误的读数方式,无法得到准确的液体体积读数。
Put water in the cylinder to a level that would cover the object. Drop the item in and if it sinks, read the new level on the graduations. The difference in volume between the two marks, is the volume of the item.
To prepare reagents, first bring all kit reagents to room temperature. To prepare your wash buffer, add 20 mL of wash buffer concentrate to 480 mL of deionized or distilled water in a graduated cylinder to yield 500 mL of wash buffer. Mix gently. ...
Which is more precise for measuring volumes of liquids, the volumetric pipet or the graduated cylinder? Why? Could you have determined which device is more precise by making a single measurement? Why or why not? What are qualitative data measurements? A. ...
Find a graduated cylinder or measuring cup large enough to hold the object being measured. Step 2 Fill the graduated cylinder with adequate water. When placed in the cylinder, the object must be fully submerged in the water. Also, be careful not to put in so much water that the water lev...
How is a pressure transducer calibrated? How is stroke volume measured? Why is bromine liquid at room temperature? How is the Langelier Index of a water sample calculated? Explain how a water filled graduated cylinder is inverted in a pan of water. ...
We then needed a sterile cotton swab, a vial of S. marcenscens, two cloves of garlic, eighteen sterile circles of filter paper, two glass bowls, tweezers, a garlic press, a stirring rod, a graduated cylinder, a timer, an incubator, a sharpie, a ruler, tape, and our instruction ...
When a metal has a low melting point you can, of course, just melt it and pour it into a graduated cylinder to measure its volume. But gallium, if there was any of it in this alloy, tends to "wet" a wide variety of other substances. So, presuming there was gallium or something th...
Select a rock sample with an approximate weight of 20 to 30 g. Step 2 Weigh the rock on the scale; for example, the rock mass is 20.4 g. Step 3 Fill the graduated cylinder approximately half full with water. Then determine the exact water volume using the cylinder scale. For example,...
For liquids, the volume can be directly measured using the graduated cylinder. Calculations to Find Density To find density, divide the measured mass by the measured volume (D = M ÷ V). Density Formula Examples: Solids ...