At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. the echo from the bottom of the lake returns to the point of origin 0.164 s later. the air and water temperatures are 20°c. how deep is the lake?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?