1. Firmly hold with one hand the end of a ruler over the edge of a table. Pull the other end down gently and listen to the sound. Then give the ruler a harder downward pull, and see if there is a difference in sound. Describe what you hear and explain the difference using the terms “energy,” “amplitude,” “intensity,” and “decibel.” 2. Take some time to listen to sounds in your environment. Make a list of ten sounds, ranking them from the highest pitch to the lowest. Write a couple of sentences describing whether this was easy or difficult and why. (Some of the sounds can come from tapping objects that vibrate or playing musical notes on an instrument.)
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Physics, 22.06.2019 19:40, rileybaby34
Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.
Answers: 3
Physics, 22.06.2019 22:50, erinharrington15
What is an electric motor? explain its operation. 2-3 sentence
Answers: 1
1. Firmly hold with one hand the end of a ruler over the edge of a table. Pull the other end down ge...
Social Studies, 24.06.2021 18:20