Question

1. A flask containing 800 g. of water is heated. If the temperature of the water increases from 20 degrees Celsius to 85 degrees Celsius, how much heat (in joules) did the water absorb?

2. How much heat, in joules, and in calories, must be added to a 75 g. iron block with a specific heat of 0.451 J/g degree Celsius to increase its temperature from 25 degrees Celsius to its melting temperature of 1535 degrees Celsius?

3. Consider sound waves with a speed of 344m/s and frequency of 20 Hz. Find the wavelength of the sound wave.

4. A sound wave has a speed of 344 m/s and a wavelength of 0.5 m. What is the frequency of the wave?

5. A periodic wave has a period of 0.40 s. What is the wave frequency?

Answer 1