The lowest key on a piano plays a note called A0 (27.5 Hz). If you push that key down very slowly and hold it, the felt hammer below won't have enough energy to strike the string but the wool damper, which usually rests on top of the string to stop it from vibrating, will stay lifted leaving the string "open." If you then play an A major chord one octave op, consisting of A1 (55 Hz) - C#2 (68.75 Hz) - E2 (82.5 Hz) - A2 (110 Hz), with a quick, hard strike and sudden staccato release, you will hear a soft, long-lived echo of the chord even though the dampers have stopped vibration in the strings of the chord. What is going on here? Explain in a few sentences.

here are some information of the future of geothermal energy:

-the future of geothermal energy can pretty much be summed up with a single word: more

-scientists plan in going deeper than 120 meters

-we are hoping that one day, we will get all of our energy from renewable energy sources such as geothermal energy

hope this !

does anyone know or what?

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is