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一、填空题(共36分,每空1分) 1.物体____叫做质量。在用天平测某物体质量的实验中。三次测量数据分别是:267.5克、267.8克、267.6克,则最接近物体质量的真实值是____克。 2.用绳子拉着小车在光滑的水平面上运动,如果绳子突然断了,小车将做____运动,这是由于小车具有____的缘故。 3.白炽灯是利用电流的____效应制成的,它的灯丝是用电阻率大____高的金属钨做的。 4.跳伞运动员在空中匀速下降的过程中,动能____,势能____,机械能____。(填增大、减小或不变) 5.某导体电阻为10欧,当通过它的电流为1安时,1分钟内产生的热量是____焦;当通过它的电流强度增大1倍时,在相同时间内产生的热量是原来的____倍。
First, fill in the blank (a total of 36 points, 1 point per empty) 1. Object ____ is called quality. In an experiment using a balance to measure the mass of an object. The three measurements were: 267.5 grams, 267.8 grams, 267.6 grams, and the closest actual value to the object was ____ grams. 2. Pull the trolley with a rope and move it on a smooth level surface. If the rope suddenly breaks, the trolley will do ____ movement. This is because the trolley has ____. 3. The incandescent lamp is made using the current ____ effect, and its filament is made of metal tungsten with a high resistivity _______. 4. During the course of the sky diving, the skydiver has kinetic energy ____, potential energy ____, and mechanical energy ____. (Increase, decrease, or change) 5. The resistance of a conductor is 10 ohms. When the current passing through it is 1 ampere, the heat generated within 1 minute is ____ coke; when the current intensity passing through it increases At 1x, the heat generated at the same time is ____ times the original.