You and your friend peter are putting new shingles on a roof pitched at 20degrees . you're sitting on the very top of the roof when peter, who is at the edge of the roof directly below you, 5.4 m away, asks you for the box of nails. rather than carry the 2.1 kg box of nails down to peter, you decide to give the box a push and have it slide down to him. if the coefficient of kinetic friction between the box and the roof is 0.51, with what speed should you push the box to have it gently come to rest right at the edge of the roof?
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Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c
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Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
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You and your friend peter are putting new shingles on a roof pitched at 20degrees . you're sitting o...
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