Which electrode in thomson’s vacuum tube was positively charged

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer