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A flotation device is in the shape of a right cylinder, with a height of 0.550 m and a face area of 4.00 m2 on top and bottom, and its density is 0.320 times that of fresh water. It is initially held fully submerged in fresh water, with its top face at the water surface. Then it is allowed to ascend gradually until it begins to float. How much work does the buoyant force do on the device during the ascent?
A carpet is to be installed in a room of length 8.74 m and width 5.8 m. Find the area of the room retaining the proper number of significant figures
A tourist drops a rock from rest from a guard rail overlooking a valley. What is the velocity of the rock at 4.0s? What is the displacement of the rock at 4.0s? Suppose the tourists threw the rock with an initial velocity of 8m/s down. determine the ..
a train consists of 50 cars each of which has a mass of 7.2times 103kg. the train has an acceleration of7.9 times
q1. collapsible plastic bags are used in hospitals for infusions. we want to use such a bag to infuse an electrolyte
A 954 kg drag race car accelerates from rest to 113 km/h in 0.919 s. What average force is exerted on the car
The heels on a pair of women's shoes have radii of 0.54 cm at the bottom. find the stress on each heel
In a typical Hollywood movie stunt, a person jumps off a building and lands on a cushion to safely stop. How much voltage should the battery have to stop the object as it reaches the ground
The filament of a light bulb has a temperature of 3.48 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.253. Find the surface area of the filament
A very thin sheet of plastic (n=1.60) covers one slit of adouble-slit apparatus illuminated by 640-nm light, What is the (minimum) thickness of the plastic
A skydiver opens the parachute at the moment when he is 540 meters above the ground and his speed (right before opening the parachute) is 97m/s. What should be the magnitude of the air resistance force
A thin soap film (n = 1.302) suspended in air has a uniform thickness. When white light strikes the film at normal incidence, violet light (&lambdav = 412 nm) is constructively reflected. At what angle of incidence will green light (&lambdag = 562..
why is it advisable to make use of a proper restraining seat rather than hold a child on your lap.
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