1. Y

    Specific heat

    A 100gm copper block is heated is boiling water for ten minutes and then it is dropped into 150gm of water at 30Cels. In a 200gm of Calorimeter. If the temperature of water is raised to 33.6 Cels. Determine the specific heat of material of the calirometer. Copper specfic heat 386 and water...
  2. O

    Light intensity over a specific distance

    Hi guys, I’m looking for some help if any of you would be kind enough (Bigsmile) I am trying to calculate how many lux/lumens an LED needs to be in order to reach the end of a long tunnel then reflect off a mirror and travel up a short distance and the light be seen at the end point. I’m...
  3. TyrannosaurusWreck

    Specific Heat Problem

    Hello again, I'm trying to figure out this problem- A 2.4 kg iron ball is dropped from a height of 14 m onto a concrete roadway, and 2.5% of its kinetic energy at the time it reaches the ground is transformed into internal energy in the ball itself. (The rest of the energy is transmitted to...
  4. C

    Specific heat capacity

    During the street has worked out a student generates 2000 kilojoules of heat energy what mass of water would have to evaporate from the students skin to dissipate this much heat
  5. I

    Specific Heat of a nonlinear, temperature dependent spring

    Here is the problem: A nonlinear spring has a temperature dependent force law, F = -(K/T)(L-Lo)^3 At a temperature T = To and length L = Lo the specific heat at a constant length is CL = Co. What is the specific heat at T = To when the spring is stretched to length 2Lo? I am really not sure...
  6. O

    How to set specific vibration frequency within crystal?

    I would like to know on how to set specific vibration frequency within crystal, does anyone have any suggestions on what is required and how to do it? Thanks in advance for any suggestions
  7. W

    specific molar volume

    Hi, I am attempting a fluid mechanics problem involving viscosity using eyring equation. Equation as follow: Where, N^ is avogadro constant h is planck's constant, T_b is boiling temperature T is temperature, and V^ is specific molar volume [Bird et al 2012] given: pressure...
  8. A

    Specific Gravity Problem

    Well, to start off, I'm in a Theoretical Physics class and we've been given this (what I believe to be) a pretty difficult problem with no preparation at all. I have no memory of going over specific gravity (I haven't taken much chemistry, and that's my fault), nor any other buoyancy or fluid...
  9. D

    Specific heat calculation

    I'm having a bit of a mental block that perhaps someone here could help out with. The task is as follows: To raise the temperature of a container by 1K requires 50J. 250g of a fluid is placed in the container. The temperature is raised with a heater, P = 15W. After a while the temperature is...
  10. S

    Specific heat capacity

    If 1 kg of substance A with a temperature of 76 degrees is mixed with 2 kg of substance B that has a temp. of 14 degrees. The final temperature is 45 degrees C. Which original substance has greater SHC?
  11. R

    Specific heat and thermal equilibrium

    Hello everyone! I have here a problem about specific heat and thermal equilibium, it goes: (a) Two 39 g ice cubes are dropped into 190 g of water in a thermally insulated container. If the water is initially at 25°C, and the ice comes directly from a freezer at -11°C, what is the final...
  12. P

    Specific latent heat and heat capacity

    0.1g of ice was added to a lemonade of mass 330g at an initial temperature of 28 degree celcius and it completely melted. Considering only the lemonade and ice cubes, calculate the final temperature of the lemonade. Given: specific latent heat of fusion of ice= 336000 J/Kg specific...
  13. J

    Specific heat / heat capacity help!!

    Hey everyone, im having some trouble with an assignment question which is due in a few hours. Could anyone please help me try to understand the question as i am quite stumped. Any help would be appreciated :D A 0.350 kg sample is placed in a cooling apparatus that removes energy as heat at a...
  14. F

    specific heat

    The specific heat of a substance varies with temperature according to c = 0.20 + 0.14T + 0.023T2, with T in °C and c in cal/g·K. Find the energy required to raise the temperature of 2.0 g of this substance from 5.0°C to 15.00°C. i would have done the integral of the equation using the values 15...
  15. C

    Specific Heat Help

    If anybody could take a few minutes to help me out with these problems.. 1. What is the specific heat of water in (J/kg C) converting from (cal/g C) with all conversions so I can understand what's going on? 2. In connection with the gas laws, we often use the molar specific heat. This is...
  16. A

    Specific latent heat of fusion

    See the diagram. The diagram shows the cooling curve of a substance which starting as a liquid solidifies. Obtain the value of the specific latent heat of fusion of the substance: room temperature 20 deg, slope of tangent to curve at 70deg=10K/min, specific heat capacity of liquid = 2.0*10^3...
  17. A

    Specific latent heat of fusion of ice

    Ice at 0deg is added to 200g of water at 70deg in a vacuum flask. When 50g of ice has been added and all has melted the temperature of the flask and contents is 40deg. When a further 80g of ice is added and all has melted, the temperature of the whole is 10deg. Calculate the specific latent heat...
  18. D

    specific heat capacity

    1. 1 kg of a certain type of material requires 500 kJ of heat to increase its temperature by 15 °C. How much heat is needed to increase the temperature of 6 kg of that material by 28 °C? 2. A container has 2 kg of water at 70 °C. A total of 100 kJ of heat is supplied to the water every...
  19. S

    Specific Heat of Metals

    Any help would be great: 1) Why is specific heat of water equal to unity, ie., 1.0 cal/g-Celcius or 1.0 kcal/kg-Celcius? 2) Given that the specific heat of one material is twice that of another, compare the relative amounts of heat required to raise the temperature of equal masses of each...
  20. A

    Current at a specific time.

    I have a graph of voltage - time for a.c., i know the frequency and max V and resistance for the circuit. the circuit is comprised of an a.c. source and a 10kiloohm resistor. i am asked to find the power dissipated in the resistor at a specific time. i used I = V/R to find the current and then...