How far did firefighter slide down the pole
Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 760 N, and his speed at the bottom of the pole is 3.5 m/s. How far did he slide down the pole?
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What mass of sodium fluoride must be added to 250. ml of a0.100 M HF solution to give a buffer solution having a pH of 3.50 ?ka(HF) =7.1 x 10^-4
We determined the sodium content of 15 boxes of corn flakes 300 grams. The data (in milligrams) are: 128.77, 131.15, 129.65, 132.33, 130.54, 130.72, 131.67, 133.02, 127.98, 130.12, 129.37, 129.91, 130.19, 128.64 and 131.62. There is sufficient evi
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If an archaeologist finds anancient firepit containing partially consumed firewood, and the14C content of the wood is only 22.5% that of an equal carbon sample from a present-day tree, what is the age of the ancientsite?
Calculate (a) the specific heat and work transfers for each process (kJ/kg), and (b) the cycle efficiency. Sketch the cycle on the T-s and h-s diagrams for water.
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An 85 gram bullet is shot at a 3 kg piece of wood at rest on the end of a counter 1.2 m high. If the bullet becomes embedded in the block and they land 5 m from the counter, what was the initial speed of the bullet at impact?
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