physics

A copper (Cu) weight is placed on top of a 0.24 kg block of wood (density = 0.60*10^3 kg/m3) floating in water. What is the mass of the copper if the top of the wood block is exactly at the water's surface?

  1. 👍
  2. 👎
  3. 👁
  1. Vb = 0.24kg / 600kg/m^3 = 0.0004 m^3. =
    400cm^3 = Vol. of block of wood.

    Mass = 400cm^3 * 0.001kg/cm^2 = 0.4 kg = mass of water displaced = mass of copper + block.

    Mass of CU = 0.40kg - 0.24kg = 0.16 kg

    1. 👍
    2. 👎
  2. Correction: 0.oo1kg/cm^2 should be
    0.001kg/cm^3. Does not affect results.

    1. 👍
    2. 👎
  3. eh! wrong...

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    1. A cylindrical disk of wood weighing 45.0N and having a diameter of 30.0 cm floats on a cylinder of oil of density 0.850 g/cm3. The cylinder of oil is 75.0 cm deep and has the same diameter of the wood. (a) What is the gauge

  2. Chemistry

    A block of wood has a mass of 6.0 g and a volume of 12.0 cm3 whats the density of the block of wood?

  3. physics

    As shown in the diagram, a bullet of mass 7.0 g strikes a block of wood of mass 2.1 kg. The block of wood is suspended by a string of length 2.0 m, forming a pendulum. The bullet lodges in the wood, and together they swing upward

  4. Physics

    the weight of the block if wood is 96.5 N. the coefficient of static friction between the block of wood and vertical wall is 0.45. what minimum force is required to prevent the block from sliding down the wall

  1. physics

    A 10 cm by 10 cm by 10 cm wood block with a density of 700 kg/m^3 floats in water. a. What is the distance from the top of the block to the water if the water is fresh? b. If it's seawater?

  2. Physics

    A block cedar has a mass of 200 kg and density of 570 what fraction of the wood will be surface of block is floating in water

  3. PHYSICS

    A 15g bullet is fired horizontally into a block of wood with a mass of 2.5 k and embedded in the block. Initially the block of wood hangs vertically and the impact causes the block o swing so that its center of mass rises 15cm.

  4. physics

    A load of 80N extends a spring by 8cm. When the load is replaced by a copper block, the extension produced is 10cm. Calculate the weight of the copper block, assuming that the elastic limit of the spring is not exceeded.

  1. Science

    Which objects will sink or float if the density of pure water is1/gm or 1gm/cm3. The following of the following objects will sink or float if the mass, volume, and density of the objects are: Small sized block : mass=4.5 grams,

  2. physical

    An ice cube at 0°C measures 13.9 cm on a side. It sits on top of a copper block with a square cross section 13.9 cm on a side and a length of 19.1 cm. The block is partially immersed in a large pool of water at 88.5°C. How long

  3. Physical science

    Hello! 1.How can the density of a hollow lead ball filled with water be increased? a.Increase the size of the ball and add more water.* b.Remove the water and replace it with air. c.Remove the water and melt the ball into a solid

  4. maths and science

    A block of wood of volume 25 cm floats in water with 20 cm of its volume immersed calculate it's density and weight

You can view more similar questions or ask a new question.