Crew members attempt to escape from a damaged submarine 80 m below the surface. What force must be applied to a pop-out hatch, which is 1.05 m by 0.55 m, to push it out at that depth? Assume that the density of the ocean water is 1025 kg/m3?

a) How much cargo mass can a ship of mass (2.8x105 kg) with dimensions (15 m x 12 m x 6 m) carry without sinking? W h 6) What is the air pressure above a given fluid of density (2300 kg/m 3 ) if the pressure is (180 kPa) at a depth of (4 m) below the surface?

Problem 3: A tourist accidentally dropped a 1 kg gold bar into the ocean. The depth of the ocean is 4 km, and the density of seawater is 1036 kg/m³. The density of gold is 19300 kg/m³. (a). What is the net force on the gold bar? (b). How long does it take for the gold bar to sink to the bottom of the ocean?

the plunger and the needle of a hypodermic syringe have areas of 0.5 cm^2 and 0.0006 cm^2, respectively. To inject a vaccine, a nurse pushes the plunger with a force of 5.5 N. What pressure is transmitted into the vaccine?

Bird bones have air pockets in them to reduce their weight. This also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 43.0 g and its apparent mass when submerged is 3.60 g (the bone is watertight). What mass of water is displaced?

A submarine is stranded on the bottom of the ocean with its hatch 25 m below the surface. In this problem, assume the density of sea water is 1.03 × 103 kg/m3. Calculate the force, in newtons, needed to open the hatch from the inside, given it is circular and 0.55 m in diameter. The air pressure inside the submarine is 1.00 atm.

Over the summer I decide to supplement my income educational offerings by building a glass-bottomed boat to drive around Lake Michigan. The glass floor is a rectangle, two meter by three meters, and that floor lies one meter below the water's surface. What additional force pushes up on the glass floor due to the increased gauge pressure underwater?  a 10,000 N  b 40,000 N  c 60,000 N  d 120,000N

A hollow plastic sphere is held below the surface of a lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.650 m3 and the tension in the rope is 900 N. (a) Calculate the force of pushing water on the sphere. (b) What is the mass of the sphere? (c) The cord breaks and the sphere rises to the surface. When the sphere stops, what fraction of its volume will be submerged?

The water pressure acting on a submarine at depth is 2.6 x 106 Pa.  What is the magnitude of the force (in kN) that acts on a hatch door with an area of 0.87 m2

A large ebony wood log, totally submerged, is rapidly floating down a flooded river. If the mass of the log is 476 kg, what is the buoyant force acting on the submerged log?