You are on an island where a huge explosion at a distance of 500 miles away can be heard. How long (in seconds) does it take the sound to travel to your location? Assume the temperature of the air is 20 oC
a. 1.4 s b. 5.6 s
c. 2340 s d. 8955 s
c
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A 0.600-kg piece of metal is heated to 100°C and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at 17.3°C
The final equilibrium temperature of the mixture is 20.2°C, what is the specific heat of the metal? A) 140 J/kg ? C° B) 180 J/kg ? C° C) 270 J/kg ? C° D) 450 J/kg ? C° E) 900 J/kg ? C°
Which of these has a higher frequency than visible light?
A) radio wave B) microwave C) infrared wave D) ultraviolet wave E) all do
A 2.65-kg block of ice is at STP (0°C, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 × 10^5 J/kg)
a. zero b. 1 620 J/K c. 811 J/K d. 3 240 J/K e. 6 480 J/K
When the northern hemisphere is experiencing winter
What will be an ideal response?