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.
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