- Moving a sofa into a moving trucks requires 2925 J of work by the moving man. If the work done by the inclined plane to move the sofa is 2205 J, what is the efficiency of the inclined plane?
Step # 1
Step #2
Step #3

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?