If - = 0, then the vectors and have equal magnitudes and are directed in the same direction
Indicate whether the statement is true or false
TRUE
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A 2.0-kg block of aluminum at 50°C is dropped into 5.0 kg of water at 20°C and the temperature is allowed to stabilize. What is the total change in entropy during this process, assuming no heat is exchanged with the environment?
The specific heat of aluminum is 910 J/(kg ? K) and the specific heat of water is 4190 J/(kg ? K). A) 8.2 J/K B) 10 J/K C) 3.3 × 10-2 J/K D) 3.8 × 10-3 J/K E) 2.4 × 10-3 J/K
Which of these wins the prize as the blandest appearing planet as revealed visually by space probes?
a. Jupiter b. Saturn c. Uranus d. Neptune
How much mass does the Sun lose through nuclear fusion per second?
A) 4 tons B) 4 million tons C) 600 tons D) 600 million tons E) Nothing: mass is conserved.
The sky is blue because molecules scatter blue light more effectively than red light
Indicate whether the statement is true or false