Part D The initial time, final time, and time interval for this video sequence are already entered in the table below. Enter velocity observations for these
two times, and then calculate the change in the boy's velocity and his average acceleration during this time Interval. (Be sure to double-check signs
in your results. Remember, the boy is slowing down, not speeding up!)
BIU x x Font Sizes
0
Slide 1 (child)
initial time. t (5)
0.205
1.805
1.605
final time, t51
change in time. Art. 1 (5)
D
Initial velocity. V m/s)
final velocity, vorm/5)
change in velocity av = v(m/s)
1
acceleration, Aviams

Could you display the mirrors

Part of the text of the exercise is missing.complete text: "a semiconductor laser in a cd player has an output wavelength of 780nm and a power level of 0.10mw. how many photons strike the cd surface during the player of a cd 69 minutes in length? ? "solutionthe power is the energy per unit of time; the laser power is  , and it is applied for a time t of  . from the previous equation we can find the total energy delivered by the laser during this time: then we can find the frequency of the photons of the laser light. in fact, we know the relatioship between c (speed of light), f (frequency) and  (wavelength): using  and  , we getfrom this, we can find the energy carried by one single photon of this frequency: and finally, we can find the number of photons dividing the total energy delivered by the laser by the energy carried by one single photon:

D. to reassure the country of his credibility and emphasize the importance of standing united behind the government.

The circumference of the clock is 43.98 in