A kg of 40°C water and a kg of 20°C water, after being mixed, have a temperature of 30°C. But the final temperature of a 1-kg iron block at 40°C placed into 1 kg of water at 20°C is
A. less than 30°C.
B. more than 30°C.
C. at or about 30°C.
D. none of the above
Answer: A
You might also like to view...
Which of the following best defines temperature?
A) The amount of heat energy required to raise the temperature of a substance by 1 degree Celsius. B) The direct measure of the average kinetic energy of a substance's molecules. C) The energy needed to break the intermolecular bonds that hold molecules in place. D) The energy transfer from one body to another due to a difference in temperature. E) Weak interactions that become significant when molecules are very close together.
Seasons are caused by ____
A) changes in the weather B) annual variation in the energy output of the sun C) Earth's orbital tilt relative to the plane of its orbit around the sun D) our being closer to the sun in summer
Why might an area with a large amount of limestone (CaCO3) be less susceptible to acid rain?
A. Only acid rain made from sulfur compounds reacts with the limestone. B. The acid in the rain is neutralized by the natural base in the limestone. C. The rain travels quickly through the porous limestone, and therefore, the rate of reaction is slower. D. Limestone is degraded by acid rain, and therefore, acid rain has the same damaging effects. E. none of the above
How large an area would you have to look through if your friend’s location were given as 0.00°, 36.00°E?
What will be an ideal response?