The energy of one photon of light is related to wavelength (λ) of light using the equations: for green light with a wavelength of 454 nm, the energy (in joules) can be calculated using the following values: plank's constant (h) = 6.626 x 10-34 j*s speed of light (c) = 2.998 x 108 m/s wavelength (λ) = 454 x 10-9 m. calculate the energy (in j) of a green photon and enter your answer using three significant figures and exponential notation. (for example, 456000 would be entered as 4.56e5.)

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up