What is the wavelength of a sound wave with a frequency of 50hz (speed of sound is 342 m/s?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

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

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j