An easel.
If the object is falling down, it is accelerating. "Inertial frames of reference" do not include acceleration, so the falling object can't be considered an inertial frame of reference, according to the Special Theory of Relativity. However, the General Theory or Relativity explores additional complications due to gravity. In any case, if you wish, you can use the object accelerating downward as a reference frame (just don't call it "inertial"); in this case, obviously the room is accelerating upward, compared to the falling object. It all depends what object you choose as your reference frame.
You call it an OBSERVATION.
I call it 'diffraction'.
he invented electricity and if you want to call him call 8675309
u call them andantes i think
modern canvas as they call it is made of cotton
I believe it comes from Africa.
Typically, painting is done on a "canvas" which is not only tightly woven but tightly stretched on a wooden frame and securely tacked in place.
A graffiti canvas.
CANVAS
An upright piano.
Artists.
Artists
Patrons
It is an abacus.
An agent or representative.
The best artists