A 选项“Beaker”(烧杯)通常用于容纳和混合物质,但测量液体体积不够精确。B 选项“Flask”(烧瓶)主要用于反应和加热,不是专门用于精确测量液体体积的。C 选项“Measuring cylinder”(量筒)专门用于精确测量液体体积。D 选项“Test tube”(试管)一般用于少量物质的反应,不用于测量体积。
1 A student uses a measuring cylinder to measure the volume of a quantity of water Which action would make her result less accurate? D A making sure her eye is level with the water surface B making sure the cylinder is vertical C reading the bottom of the meniscus D using the largest ...
6 D1 safety precaution relating to pressure, e.g. safety screen D2 use of (protective) gloves to handle hot salt solution/beaker/flask D3 density of salt solution or ρ given by m/ V D4 measuring cylinder to measure volume and difference in top pan balance/scales readings to measure ...
MOIRE MEASURING DEVICE USING A CYLINDER LENS, WHICH CAN BE USED TO A GLASS AND A WAFER WITH HIGH-TRANSPARENCY AND REFLECTIVITYPURPOSE: A moire measuring device using a cylinder lens is provided to accurately measure round bump by measuring a glass and a wafer with high-transparency and ...
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One of the radars employed in the ground control technique is to detect __ of the airport. A) the space B) the length of the runways C) the inside D) the nearby area 65. Special radars are used by airplanes to measure their speed or identify moving targets, because the frequency of...
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A multimeter was used to measure the electrical current. 3. Practical steps The practical steps for the current research are divided into two-cycle. Firstly, the forward cycle, then a reversed cycle. In the beginning, liquid water existed in both evaporator and condenser. After that, in all ...
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