Unsure About Island Temperatures? Unlock the Answers Here!

  • Context: High School 
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Discussion Overview

The discussion revolves around the factors influencing island temperatures, particularly focusing on the role of water's specific heat and its effects on temperature moderation. Additionally, participants engage in a homework-related inquiry involving calculations of temperature change and wave speed, along with conceptual questions about wave propagation.

Discussion Character

  • Exploratory
  • Homework-related
  • Mathematical reasoning
  • Conceptual clarification

Main Points Raised

  • One participant expresses confusion about the factors affecting island temperatures, suggesting high specific heat or reflection of solar radiation as possible explanations.
  • Another participant asserts that specific heat is the key factor, noting that oceans absorb solar energy and do not cool down quickly.
  • A participant presents a math problem regarding the temperature change of water when it absorbs heat, providing their calculated answer.
  • Another participant agrees with the temperature change calculation but offers a slightly different result using a conversion factor for calories.
  • Questions arise about the calculation of wave speed, with one participant questioning the use of wavelength and frequency, and another participant providing a different calculated speed.
  • A conceptual inquiry is raised regarding the behavior of circular wavefronts on water's surface and whether the spacing of ripple peaks changes as they spread out.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the calculations presented, as different answers are provided for both the temperature change and wave speed problems. Additionally, there is an ongoing inquiry into the nature of wave propagation that remains unresolved.

Contextual Notes

Participants' calculations depend on specific assumptions, such as the conversion between calories and Joules, and the interpretation of wave behavior in relation to distance from the source. The discussion does not resolve these assumptions or clarify the implications of the differing answers.

DevilDoc
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Just confused :confused: with the questions. I can't find the answer anywere.

The moderate temperatures of islands through out the world has much to do with water's? I'm thinking high specific heat or reflection of solar radiation but not sure.
 
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Specific heat is the answer, the oceans absorb the energy from the sun and do not cool down very quickly.
 
Additional help.

I'm not really good in math. Please help, not sure If got the right answer.

1 ) 2000 grams of water absorbs 5000 J of heat. If the specific heat of water is 1 cal/g C. What is the change of temperature of the water?
My answer is: 0.595 C.

2) When a tiger drinks water, it ames portion of water oscillating up and down four complete cycles per second. As the water wave spreds, the wavelength is 5 CM. What is the wave's speed?
My answer is: 1.25 m/s.
 
I agree with the temperature change--actually, I got 0.597 degrees using 4.186 Joules = 1 calorie.

For the speed, are you using wavelength*frequency = speed ? Notice that the wavelength is in centimeters; I got 0.2 m/s.

Another question: do circular wavefronts on the water's surface maintain equal spacing as they spread out? The tiger's tongue is oscillating at a constant rate--so a bob placed any distance from the center would bob up and down at a constant (temporal) rate--but do the ripple peaks get closer together or further apart as you go out? I'm just wondering if it's really fair to talk about the 'wavelength' for such a mode of propagation.

P
 

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