physics

A copper container of mass 100g contains 500g of water. A steel paddle of mass 85g stirs the water. A pulley system operates the paddle.
A) the mass (15kg) drops 2,4m, turning the steel paddle. Assume heat lost to surrounding is negligible.
1. Find the energy transfered to the container,water and paddle.
2. Find the rise in temperature of the water.
3. Assume that the rise in temperature of the steel paddle is the same as that of the water when the energy is transferred from the pulley system to the water. Find the energy needed to raise temperature of 1kg steel paddle by 1 degree Celsius.

  1. 👍 1
  2. 👎 0
  3. 👁 345
  1. a. gravitational energy=heatinwater, assuming the dropping mass did not gain velocity.

    b. masscopper*cc*deltaT+masspaddle*c*deltaT+masswater*cw*deltaTemp=total energy in

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree

    asked by Anonymous on July 31, 2012
  2. Chemistry

    A 110.-g sample of copper (specific heat capacity = 0.20 J/°C · g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final temperature of the water and copper is 23.5°C. What is the mass of the water

    asked by Brittney on July 11, 2011
  3. Physics

    What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 9.38 g when measured in air and an apparent mass of 8.55 g when submerged in water? A)Copper B)Iron or steel C)Aluminum D) Lead E)Concrete

    asked by Larisa on January 31, 2016
  4. physics

    A piece of copper ball of mass 20g at 200°c is placed in a copper calorimeter of mass 60g containing 50g of water at 30°c ignoring heat losses.calculate the final steady temperature of mixture.(specific heat capacity of

    asked by Abiodun on January 29, 2017
  5. Physics

    A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.0 m long, 2.2 m wide, and 2.3 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it

    asked by Linda on April 19, 2014
  1. Physics

    1)An alloy of copper zinc has a mass of 4.9kg.when suspended in water.0.98kg of water was displaced by it.calculate the mass of zinc in the alloy if 2.5 and 19.6 are the specific gravity of the zinc and copper respectively 2) A

    asked by Skyboy on December 18, 2015
  2. physics

    A solid copper object hangs at the bottom of a steel wire of negligible mass. The top end of the wire is fixed. When the wire is struck, it emits sound with a fundamental frequency of 300 Hz. The copper object is then submerged in

    asked by Rachel on February 16, 2011
  3. physics

    (a) Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 3.76 cubic meter of water in kg. (b) Suppose that it takes 10.4 hours to drain a container of 59.1 m^3 of water. What is the “mass flow

    asked by sagara on January 26, 2011
  4. physics

    Suppose that it takes exactly 17.0 hr to drain a container of 6.20 liters of water. What is the average mass flow rate (in kilograms/second) of water from the container? Assume that the density (mass/volume) of water is exactly 1

    asked by lucas on September 9, 2013
  5. physics

    a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree

    asked by Anonymous on July 31, 2012
  6. College Physics

    2 questions: a)Assuming that water has a density of exactly 1 g/cm3 (cubed), find the mass of one cubic meter of water in kilograms. b)Suppose that it takes 10 hours to drain a container of 5700m3 (cubed) of water. What is the

    asked by Frank on August 22, 2010

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