Which best describes the energy of a sound wave as it travels through a medium? it increases. it decreases. it remains the same. it depends on the medium.

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

The softest and hardest minerals are: softest hardest