How does quantum theory explain blackbody radiators?
oa. as heat is added, additional photons across a wide range of
visible-light frequencies are emitted.
ob. raising the temperature results in the object giving off high-energy
ultraviolet light.
oc. as heat is added, only certain specific temperature values are
possible.
od. raising the temperature causes more photons of a few specific
energies to be emitted.

Sound energy is produced when an object vibrates. examples are 1- a balloon popping2-a whistle3- a waterfall

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Im not from america so could you explain what route 70 is? how much km or miles does it have? am i supposed to know ,from this text,what the s(road) is? how many km or miles it has?

Iwould say the answer is b.  christians believed jesus was the messiah, or savior of man.  because most jews do not believe  in jesus