An experiment is designed to test what color of light will be activated photoelectric cell best. the photocell is set in circuit that "clicks" in response to current. the faster the current, the more clicks per minute. in the experiment, the number of clicks in one minute is recorded for each color of light shining on the photocell. to change the color of light, a different color of cellophane is place over the same flashlight and the flashlight is then located a specific distance from the photocell.
which of the following would be the best hypothesis for this experiment?
a.) red light will activate the photocell to the highest degree.
b.) if photoelectric cell respond better to short wavelengths of light, the red light should activate it the least and blue the most.
c.) photoelectric cells are affected by different wavelengths of light.

dynamic equilibrium is the answer.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

b) nuclear ive learned that in a pedtrodic table