Place a 1-kilogram block of iron at 40°C into 1 kilogram of water at 20°C and the final temperature of the two becomes
A) less than 30°C.
B) at or about 30°C.
C) more than 30°C.
Answer: A
You might also like to view...
Which of the following best sums up current scientific thinking about the nature of dark energy?
A) Dark energy most likely consists of a form of photons that we can't see or detect. B) Dark energy is most likely made up of weakly interacting particles that do not interact with light. C) Dark energy probably exists, but we have little (if any) idea what it is. D) Dark energy is the source of the mind weapon used by Sith Lords in Star Wars.
Hadrons are particles that interact via the strong force
a. True b. False Indicate whether the statement is true or false
A 1500-kg car accelerates from rest to 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hp = 746 W)
A) 60 hp B) 70 hp C) 80 hp D) 90 hp
Evaporation of raindrops in the atmosphere
A) warms the air. B) cools the air. C) does not happen, raindrops always reach Earth's surface. D) is greatest above polar ice caps.