Un corp de masse 3 kg repose sur le sol. La surface de contact avec le sol est egale à 550 cm .Calculez la pression exerée sur le sol​

Photons with the highest energy have the longest period

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm