20. which of the following statements is an accurate description of sound transmission through various mediums? a. sound insulators prevent sound from being transmitted better than elastic solids. b. gases conduct sound better than liquids. c. inelastic materials conduct sound better than elastic solids. d. elastic solids prevent sound from being transmitted better than liquids.

Which is not true about oxygen-17 and oxygen-18?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?