Which one of the following environments will sound not travel through

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.