physics

posted by .

A block of mass 200g and density 0.8g/cm3 is submerged in a liquid of density 0.2g/cm3. find minimum force required to keep the block floating.

  • physics -

    The volume of the mass is
    V = 200/0.8 = 250 cm^3 = 250*10^-6 m^3 and the buoyancy force (up) is
    Fb = V*200 kg/m^2*g = 0.49 N.

    The weight force (down) is 0.2 kg*g = 1.96 N.

    To keep it floating, an upward force of at least 1.96 - 0.49 N = 1.47 N is needed

  • physics -

    3) Calculate the mass of a substance that has a density of 0.788 g/cm3 and occupies a volume of 800 cm3.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Dobson

    a)The element with the greatest density is osmium, which has a density of 22.6g/cm3. Calculate the mass of 32.1 cm3 of osmium. b)A team of students determined the density of a sample of wood to be 0.52 g/cm3. A handbook of chemistry …
  2. PHYSICS _ please help

    A metal block of volume 1 * 10^3 cm^3 is suspended from a thread as shown in the diagram. It is lowered into a beaker of liquid of unknown density until it is completely immersed but does not touch the bottom of the beaker. The beaker …
  3. Physics

    A solid rectangular block measure 0.100*0.080m*0.060m and floats freely in a liquid of density 1354kg/m^2 if the depth of liquid 0.04m up the block largest side. Find the density of the block.
  4. Physics

    A wooden block floating in seawater has two thirds of its volume submerged. When the block is placed in mineral oil, 10% of its volume is submerged. ( a) Find the density of the wooden block. (The density of seawater is 1.024 g/cm3.) …
  5. HELP!! Chemistry

    1. Calculate the density of a material that has a mass of 52.497 g and a volume of 18.5 cm3. 2. A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock is 29.7 cm3, and the mass in 139.943 …
  6. physics

    cant find much on how to solve problems like these. any help would be appreciated. A pressure of 6000 Pa is exerted on a wall of 12 square meters area. What force is exerted on the wall?
  7. physics

    A cubical block of density rB and with sides of length L floats in a liquid of greater density rL. (a) What fraction of the block’s volume is above the surface of the liquid?
  8. Physics

    A block of mass M=0.525kg is floating stationary in a beaker of water. A string connected to the bottom of the beaker holds the block in place. The tension in the string is 7.10 N. The bottom of the block is floating a distance h=1.66cm …
  9. physics

    In the figure, the radius of the submerged cylinder is 10 cm. The height is 25 cm. The cylinder is made of Aluminum whose density is 2.7g/cm3 the water density is 1g/cm3 What is the buoyant force on the cylinder?
  10. physics

    An object with a mass of 34.0 g and a volume of 41.0 + B cm3 is placed in a liquid with a density of 1.25 g/cm3. Find the volume of the part of the object that is NOT submerged in the liquid. Give your answer in cm3 and with 3 significant …

More Similar Questions