If you wanted to hold a concert in a place that caused the sound waves generated by the musicians to produce very few echoes, which place would
you choose?
A. A room with flat surfaces that reflect sound
B. A room lined with soft materials that absorb sound
C. A room furnished with transparent materials that refract sound
D. A room lined with hard materials that amplify sound

A room lined with soft materials that absorb sound.

Explanation:

Just did it :))

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.