When ice melts, its temperature
a. increases. b. decreases.
c. stays constant. d. cannot be determined.
c
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For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?
a. amplitude maximum b. period c. frequency d. wavelength
The sensitive dependence upon initial conditions of the evolution of some physical systems is a feature of __________
Fill in the blank(s) with correct word
Latent Heats: A substance has a melting point of 20°C and a heat of fusion of 3.6 × 104 J/kg. The boiling point is 150°C and the heat of vaporization is 7.2 × 104 J/kg at a pressure of one atmosphere. The specific heats for the solid, liquid, and gaseous phases are 600 J/kg ? K (solid), 1000 J/kg ? K (liquid), and 400 J/kg ? K (gaseous). How much heat is given up by 2.80 kg of this substance when it is cooled from 170°C to 86°C at a pressure of one atmosphere?
A. 400 kJ B. 200 kJ C. 300 kJ D. 440 kJ E. 640 kJ
A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500-Hz frequency. At the time, the speed of sound in air is 340 m/s. How many beats per second do the people on the fire engine hear?
A. 0 B. 15 C. 29 D. 63 E. 250