It is easier to swim in sea water than in river water. a) True b) False
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It is easier to swim in sea water than in river water.
a) True
b) False
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- A small piece of cork weighs 0.224 N in air. When held sumberged underwater, there is a net upward force on the cork of 0.832 N. What is the density of the cork? Density = kg/m³ %3Da) What volume must a (450 kg) cube have in order to float in water?b) Suppose now that the cube from part (a) has 1/3 of the volume needed to float (so it sinks into the ocean). What is the total force on the sides of the cube at a depth of (260 m) below the ocean surface? (Cubes have 6 equal-area sides)Invalid path. A 1.05-kg beaker containing 1.99 kg of oil (density = 916.0 kg/m³) rests on a scale. A 1.98-kg block of iron suspended from a spring scale is completely submerged in the oil as shown in the figure below. Determine the equilibrium readings of both scales. spring scale N bottom scale N
- A hollow, plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.420 m3 and the tension in the cord is 1820 N. The density of water is 1000 kg/m3 a) Calculate the buoyant force exerted by the water on the sphere. b) What is the mass of the sphere? c) The cord breaks and the sphere riseto the surface. When the sphere comes to rest, what fraction of its volume will be above the surface of the water?An open container accelerates down a 30 degrees plane at 5m/s^2. What is the slope of the water surface in the container? If the container accelerates with the same magnitude in the opposite direction what is the slope of the water surface?2 Find the density of a metal necklace if its weight is measured to be 0.100 N in air and 0.0920 N when immersed in water. (Report answer in 3 SF; unit: kg/m^ 3) *
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