A sound source is placed in the center of a very wide and long room that has a low ceiling. Assume that the ceiling and floor are constructed of a material that absorbs the sound completely. In this situation, how would the intensity of the sound heard vary if a person moves from a distance of 10 meters from the source to a distance of 20 meters from the source?
1.The sound would have about the intensity 20 m from the source that it has 10 m from the source.
2.The sound would have about the intensity 20 m from the source that it has 10 m from the source.
3.The sound would have about the same intensity 20 m from the source that it has 10 m from the source.
4.The sound would have about twice the intensity 20 m from the source that it has 10 m from the source.
Question 2
A ringing alarm clock is placed in a bell jar, which is then sealed, and the air is pumped out of it. Which effect will most likely occur?
1.The sound of the ringing alarm clock will get louder as the air is pumped out.
2.The sound of the ringing alarm clock will get softer as the air is pumped out.
3.No noticeable change will occur as the air is pumped out.
4.The sound will diminish completely immediately after the air has begun to be pumped out.
Pap smear. Cells of the cervix (shown in the center) change in appearance as they progress through
To maintain balance the bipedal pelvis has a foreshortened ilium and is broader and bowl-shaped. The
Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada
Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu
A patient examination room should be simple and efficiently designed.
Fatty fish, such as salmon, are an excellent source of omega-3 fatty acids