Q: On the afternoon of January 15, 1919, an unusually warm
On the afternoon of January 15, 1919, an unusually warm day in Boston, a 17.7-mhigh, 27.4-m-diameter cylindrical metal tank used for storing molasses ruptured. Molasses flooded into the streets in a 5...
See AnswerQ: A large, 40.0-kg cubical block of wood
A large, 40.0-kg cubical block of wood with uniform density is floating in a freshwater lake with 20.0% of its volume above the surface of the water. You want to load bricks onto the floating block an...
See AnswerQ: Which has a greater buoyant force on it: a 25-
Which has a greater buoyant force on it: a 25-cm3 piece of wood floating with part of its volume above water or a 25-cm3 piece of submerged iron? Or, must you know their masses before you can answer?...
See AnswerQ: A hot-air balloon has a volume of 2200 m3.
A hot-air balloon has a volume of 2200 m3. The balloon fabric (the envelope) weighs 900 N. The basket with gear and full propane tanks weighs 1700 N. If the balloon can barely lift an additional 3200...
See AnswerQ: An open barge has the dimensions shown in Fig. P12.
An open barge has the dimensions shown in Fig. P12.63. If the barge is made out of 4.0-cm-thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in freshwate...
See AnswerQ: A single ice cube with mass 16.4 g floats in
A single ice cube with mass 16.4 g floats in a glass completely full of 420 cm3 of water. Ignore the water’s surface tension and its variation in density with temperature (as long as it remains a liqu...
See AnswerQ: Advertisements for a certain small car claim that it floats in water
Advertisements for a certain small car claim that it floats in water. (a) If the car’s mass is 900 kg and its interior volume is 3.0 m3, what fraction of the car is immersed when it floats? Ignore the...
See AnswerQ: A piece of wood is 0.600 m long, 0
A piece of wood is 0.600 m long, 0.250 m wide, and 0.080 m thick. Its density is 700 kg/m3. What volume of lead must be fastened underneath it to sink the wood in calm water so that its top is just ev...
See AnswerQ: The densities of air, helium, and hydrogen (at p
The densities of air, helium, and hydrogen (at p = 1.0 atm and T = 20°C) are 1.20 kg/m3, 0.166 kg/m3, and 0.0899 kg/m3, respectively. (a) What is the volume in cubic meters displaced by a hydrogen-fil...
See AnswerQ: When an open-faced boat has a mass of 5750 kg
When an open-faced boat has a mass of 5750 kg, including its cargo and passengers, it floats with the water just up to the top of its gunwales (sides) on a freshwater lake. (a) What is the volume of t...
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