Calculate the amount of energy contained in a photon (a quantum of visible light), of wavelength 590 nm. Express the energy in Joules. Suppose that a lamp, a source of yellow light, is sending out radiation of this single wavelength (590 nm) at the rate of one watt. How many quanta of radiation (i. e. How many photons) are emitted each second?

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