The system is located in the HairyFunyon aka near the floor
Answer:
we measure sound intensity in <em><u>D</u></em><em><u>ecibels</u></em>.
When two surfaces slide against each other, a force called friction makes them stick very slightly together. Smooth surfaces, like ice and glass, are easy to slide over. They create very little friction. Rough surfaces like rock and sand create much more friction, and are easy to grip on to.
hope it helps...!!!
Option (D) is the correct one.
In order to increase the amount of work done, we need to increase the force applied to the object.