Buoyant Definition and 167 Threads

I have been pondering about this for awhile now. If there are rocks on a boat (that's floating in a water) and one by one the rock is thrown onto the water. Does the water level rise or fall from the initial level? I believe that it will rise but am not 100% sure.

Homework Statement A 63 kg survivor of a cruise line disaster rests atop a block of Styrofoam insulation, using it as a raft. The Styrofoam has dimensions 2.00 m multiplied by 2.00 m multiplied by 0.04 m. The bottom 0.026 m of the raft is submerged. Write Newton's second law for the system...

Homework Statement A 6500-kg iceberg with density 931kg/m^3 is afloat in seawater with density 1030kg/m^3. a) Find the buoyant force on the iceberg b) the volume of water displaced by the iceberg c) The fraction of the icebergs volume that is below the waterline. Homework Equations Fb...

1.) 1 m3 object is floating in water. A third of the object is submerged. How much does the object weigh? 2.) Consider a floating hollow plastic box that has negligible mass. The volume of the box is 0.002 m3. If a 3.5 kg piece of copper is placed in the box, will the box sink or...

Consider two cubes: a copper cube (Density = 8.96 g/cm3 and a lead cube (Density = 11.4 g/cm3 that both have an edge length of 3.0 cm Calculate the magnitude of the buoyant force (in Newtons) acting on the copper cube and the lead cube when each is fully submerged in water. Show your work...

Homework Statement Suppose a buoy is made of a sealed steel tube of mass 5 kg with a diameter D = 7 cm and a length of 6 meters. At the end of the buoy is a spherical weight of galvanized steel (specific gravity=7.85). If the buoy floats in fresh water, what must be the mass of the steel M...

Homework Statement I'm trying to find the buoyant force on a hot air balloon. The mass of the displaced fluid is 2800 kg and the acceleration is that of gravity, (let's say 10 m/s^2). Homework Equations F=ma The Attempt at a Solution I think that you can just multiply these...

What's the direction of the buoyant force? I'm trying to find the equation for the charge on the Millikan oil drop experiment. It requires two equilibrium equations but I'm not sure which sign should the buoyant force have. My internet searches neither my book have been able to answer this...

What is the volume of a raft floating on water with a surface area of 8.2 m^2 and density of 700 kg/m^2. 75 cm of the raft is above the water. The density of the water is 1000 kg/m^2. ive tried B = pvg and m = pv and tried solving but nothing is working because i can't find the unknown...

Hey guys during my lab i am required to calculate the buoyant force of a liquid so i have to submerge the object in the liquid and take the reading on the balance. after that i have to lower the object to the bottom of the beaker and take the reading again. How are the data going to help in...

I haven't done Physics in some time now and have forgotten how to do some rather simple calculations it seems. I am trying to calculate the volume of a cube (in cm^3) using the buoyant force of the cube when submerged into water. The given density of water I am using is 1.00g/cm^3 or 1000...

I have a plastic ball 2.75" in diameter weighing 16 grams submerged at 6 feet depth. I am trying to determine the maximum velocity achieved when I release the ball? Also, if I tether (30) balls together with fishing line at 1/2" spacing how will that affect velocity? I really appreciate any...

Estimate the buoyant force exerted on your body by the air ( use Pair+1.029 kg/m^3). What would be the difference between your weight in the air and your weight in a vacuum? How would I proceed with this? What Equation should I use?

Homework Statement It is hard to imagine that there can be enough air between a book and a table so that there is a net upward (buoyant) force on the book despite the large downward force on the top of the book. About how many air molecules are there between a textbook and a table, if there is...

Homework Statement A cylindrical wooden log is loaded with lead at one end so that it floats upright in water. The length of the submerged portion is L = 2.56m. The log is set into vertical oscillation. (a) Show that the oscillation is simple harmonic (b) Find the period of oscillation...

I was just looking through an internet site and there was this question... Will the buoyant force acting on on aluminum sphere submerged in water increase or decrease if the temperature of both is increased. Why? This question just sparked my interest because i am not a physics major but now...

Homework Statement A 62.0-kg survivor of a cruise line disaster rests atop a block of Styrofoam insulation, using it as a raft. The Styrofoam has dimensions 2.00 m X 2.00 m X 0.0900 m. The bottom 0.024 m of the raft is submerged. a) Draw a free-body diagram of the system consisting of the...

1.A beach ball has a volume ofHow much force would you have to exert to hold this beach completely under water? I learned that for an object that is completely submerged in a liquid, the density of the object is equal to the density of the liquid. I used the formula p=m/v to get the mass...

1.A beach ball has a volume of 0.050 m^3. How much force would you have to exert to hold this beach ball completely under water? can somebody help me plss,,,,

Homework Statement A barrel is dropped into the ocean, striking the surface of the water in an upright position at time t=0 with a velocity v=0.13 m/s. In addition to the downward force of gravity, the barrel is acted upon by a force of viscous resistance proportional to its velocity, and an...

Ok so I'm in a Physics class and there is going to be a Cardboard Boat Race competition. So I have to build a boat out of cardboard for two people to fit in and it be able to float across a length's pool. I just want to know how you would find out if a boat that I build out of cardboard would...

Homework Statement As shown in the figure below, a wooden cube measuring 20.0 cm on each side floats in water with 90.0% of its volume submerged. Suspended by a string below the wooden cube is a metal cube. The metal cube measures 10.0 cm on each side and has a specific gravity of 6.00. a)...

I did an experiment where i measured the weight (in Newtons) of three objects on a spring scale. Then, i measured the weight (in Newtons) of the three objects on a spring scale while the objects were submerged underwater. How would i calculate the volume and buoyant force?

Homework Statement Suppose that an object that would normally float is held submerged How does the buoyant force in this situation compare to its weight? Explain you answer. Homework Equations I know that if a floating object isn't held submergered then its weight and buoyant force are...

Homework Statement If you had a rectangular prism and split it in half, half iron, half wood, and let if float on water, would the buoyant force be different on the different sides? The Attempt at a Solution I originally thought since the iron was more dense than the wood, it would...

Buoyant Lift Creates Useful Energy? I work at a manufacturing plant. One by product of this plant is the issuance of 2000 cfm (cubic feet per minute) of clean air. It is determined that this air could be released from as small as a 3 inch pipe with no adverse harm to the manufacturing...

Homework Statement A rectangular wooden block of weight W floats with exactly one-half of its volume below the waterline. Masses are stacked on top of the block until the top of the block is level with the waterline. This requires 20g of mass. What is the mass of the wooden block? Homework...

Homework Statement The tallest iceberg ever measured stood 167 m above the water. Suppose that both the top and the bottom of this iceberg were flat and the thickness of the submerged part was estimated to be 1.50 km. Calculate the density of ice. The density of sea water equals 1025 kg/m3...

Homework Statement An emtpy rubber balloon has a mass of 0.0120 kg. The balloon is filled with helium at 0 degrees Celcius, 1 atm pressure, and a density of 0.179 kg / m3. The filled balloon has a radius of 0.500 m. A. What is the magnitude of the buoyant force acting on the balloon...

Homework Statement A 2.8 kg rectangular air mattress is 2.00 m long, 0.500 m wide, and 0.100 m thick. What mass can it support in water before sinking? Homework Equations Density = Mass / Volume Magnitude of buoyant force = Weight of fluid displaced Buoyant force = weight of...

Homework Statement 500m long tanker loaded displaces 5.64763x10^8kg water. the tanker is moved to another planet, and it has to displace mercury. What volume of mercury would it displace? and do you need the gravity on that planet? Homework Equations Fb=Fg pf object of subject = P0V0g...

Homework Statement Iceberg area: 3.10x10^4 km^2, Flat top and bottom. Submerged part .84 km. Water density: 1.035x10^3 what is the buoyant force acting on the iceberg? Homework Equations Fb=Fg pf object of subject = P0V0g PfVfg=Weight of displaced fluid=p0v0g=weight of object...

Homework Statement An above-ground backyard swimming pool is shaped like a large hockey puck, with a circular bottom and a vertical wall forming its perimeter. The diameter of the pool is 5.2m and its depth is 1.4m. Find the total outward force exerted on the vertical wall of the pool...

[SOLVED] Basic Buoyant Force HW Question First time doing this, so bare with me:) Homework Statement A 53kg girl dives off a raft 4m square floating in a freshwater lake. By how much does the raft rise? Density of water = 1000kg/m^3 Use the equation for buoyant force. Then solve...

[SOLVED] Buoyant force on a steel boat The bottom of a steel "boat" is a 7.00 m \times 10.0 m \times 4.00 cm piece of steel ( \rho _{{\rm steel}}=7900\;{\rm kg}/{\rm m}^{3}). The sides are made of 0.550 cm-thick steel. What minimum height must the sides have for this boat to float in...

A piece of metal weighs 50 N. in air, 36.0 N in water, and 41.0 in an unknown liquid. Find the densities of the following: The metal The unknown liquid

Homework Statement Ok so we put a block of wood into water, let it float, then put a 100g weight on the side of it. Explain why the block tips and the weight falls off Homework Equations Torque=Fd Fb=pvg Fg=mg Fd>Fb The Attempt at a Solution ok i know that the...

It's me again. This time I actually understand the material, I just need help with figuring this one out. The tallest iceberg ever measured stood 167 m above the water. Suppose that both the top and bottom of this iceberg were flat and the thickness of the submerged part was estimated to...

Homework Statement (a) What is the buoyant force on 0.70 kg of ice floating freely in liquid water? _____ N upward (b) What is the buoyant force on 0.70 kg of ice that is held completely submerged under water? ______N upward Homework Equations ? The Attempt at a Solution...

Hi, I have a tricky question, and was hoping somebody could explain to me how I would go about solving it. Here it is: Oil having a density of 930 kg/m3 floats on water. A rectangular block of wood 4.00 cm high and with a density of 960 kg/m3 floats partly in the oil and partly in the...

I am not sure why this is not clicking... An object hangs from a spring balance. The balance registers 30 N in the air and when it is immersed in water it reads 20 N. What is the buoyant force on this object? Draw a FBD to solve this. FBD...

Homework Statement An object weighing 5.0 Newtons displaces a certain volume of water when dropped into a large beaker of water. The weight of the displaced water is 3.5 Newtons. The object is free to sink or float. What would be the value of the bouyant force is another object twice the...

A 0.5kg block of wood is floating in water. What is the magnitude of buoyant force acting on the block? I know that Fb = (density)(g)(V) The density of water is 1000kg/m3. g = 9.8m/s There is no way i can calculate the volume of the block with the given information. Also i know the water...

A rock with a volume of 0.2m3 is fully sumberged in water with density of 1000kg/m3. What is the buoyant force acting on the rock? Assume that gravity acts on the system 0.2m3*9.81m/s2 = 1.96 buoyant force = 1000kg/m3*1.96 = 1960N ?

Homework Statement A helium balloon has volume V0 and temperature T0 at sea level where the pressure is P0 and the air density is \rho_0. The balloon is allowed to float up in the air to altitude y where the temperature is T. (a) Show that the volume occupied by the balloon is then V =...

A spring scale calibrated in kilograms is used to determine the density of a rock specimen. The reading on the spring scale is 0.45 kg when the specimen is suspended in air and 0.36 kg when the specimen is fully submerged in water. If the density of water is 1000 kg/m^3, the density of the rock...

Homework Statement A 0.5 kg block of wood is floating in water. What is the magnitude of the buoyant force acting on the block. Homework Equations :confused: :confused: :confused: B=Buoyant force: W=weight; fl=fluid; m=mass; V=volume; DEN=density; There are a couple of...

Homework Statement An empty rubber balloon has a mass of .0111 kg. The balloon is filled with helium at 0degrees C, 1atm pressure, and a density of .179 kg/m^3. The filled balloon has a radius of .154 m. What is the magnitude of the buoyant force acting on the balloon? Answer in units of N...

How buoyant force and atmospheric pressure can be helpful in life ?

Homework Statement -A thin spherical shell of mass 0.300 kg and diameter 0.250 m is filled with alcohol ( = 806 kg/m3). It is then released from rest on the bottom of a pool of water. Find the acceleration of the alcohol filled shell as it rises toward the surface of the water. Homework...