Asound wave of frequency 240 hz is measured to have intensity level 95.0 db. if the speed of sound is 343 m/s and the density of the air is 1.25 kg/m2, what is the displacement amplitude of this sound wave? (a) 1.61 x 10m (b) 2.02 x 10 m (e) 4.04 x 10 m (c) 2.55 x 106 m (d) 3.21 x 10 m

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

Drag each item into the proper state of matter category.

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves