Physics, 22.07.2021 07:10 lizbeth232001
Người ta kéo một cái thùng nặng trượt trên sàn nhà bằng một dây hợp với phương nằm ngang một góc 450, lực do sợi dây tác dụng lên vật là 150N. Tính công của lực đó khi thùng trượt được 15m?
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1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.
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Người ta kéo một cái thùng nặng trượt trên sàn nhà bằng một dây hợp với phương nằm ngang một góc 450...
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