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  1. ...on electricity can create short-circuit. These kinds of fire are best extinguished by CO2 extinguisher.

  2. ...they have good customer service. Also, their prices are better than other labs. You can contact them, please see below: Prime Testing Group Ltd. Contact...

  3. ...on CD is typically aluminium. Please refer to the web-page below: https://en.wikipedia.org...question: The reflectance of gold is only slightly better than aluminium at wavelength between 600 nm ~700 nm...

  4. 1. Correct. 2. Where is the shaded area? Didn't see it on the diagram. 3. Correct. 4. Correct. 5. Correct. 6. Correct. 7. Correct.

  5. ...than air-conditioner; however, due to the use of waste heat of the refrigerant circuit and better heat transfer efficiency than electric water heat, the overall operating efficiency (i...

  6. ...direction. The answer is option D. 2014-11-04 20:09:24 補充: Please see [意見] column. 2014-11-04 20:11:51 補充: Your further question: 4....

  7. ...that dentist had made the injection for them, but it is better for you to see doctor and take a radiograph first. Any problem again, feel...

  8. ... for the distance it will stop on the flat part. I got it wrong as well , to further elaborate the question, since the answer is 10m 2011-10-15 22:27:31...

  9. Heat needed to melt all 0.5 kg of ice= 0.5 x (3.34x10^5) J = 167 000 J Heat given out by the 1 kg water water when it is cooled to feezing point = 1 x 4200 x 20 J = 84 000 J By comparing the two results, you would realize...

  10. (a). You need to draw a scale diagram. First draw the boy's image behind the mirror. Then draw a light ray from the feet of the image to the boy's eyes. Finally, complete the light ray from the feet of the boy to the point where the image light ray meets the mirror. (b...