The coefficient of linear expansion of aluminum is 24.0 10-6 K-1, and the density of aluminum at 0C is 2.70 103 kg/m3. What is the density of aluminum at 300C?
A) 3.93 103 kg/m3
B) 2.73 103 kg/m3
C) 2.70 103 kg/m3
D) 2.67 103 kg/m3
E) 2.64 103 kg/m3
Question 2
What is the intensity of a 70-dB sound? The threshold of human hearing is 1.0 10-12 W/m2.
A) 10-4 W/m2
B) 10-5 W/m2
C) 10-6 W/m2
D) 10-7 W/m2