How many photons strike the cd surface
A semiconductor laser in a CD player has an output wavelength of 780 nm and a power level of 0.10 mW. How many photons strike the CD surface during the playing of a CD 69 minutes in length?
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A raindrop of mass 3.36 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. What is the work done on the raindrop by air resistance?
A 0.500-kg particle has a speed of 2.50 m/s at point circle a and kinetic energy of 7.40 J at point circle b. What is the net work done on the particle by external forces as it moves from circle a to circle b?
A 3.20-kg object has a velocity (5.60 ihatbold - 1.80 jhatbold) m/s. Find the net work done on the object if its velocity changes to (8.00 ihatbold+ 4.00 jhatbold) m/s.
The analysis of 4.017g of a strontium iodide hydrate revealed it contained 3.041g of anhydrous strontium iodide and thus 0.976g of water . Determine the formula of the hydrate.
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 500 mL of a solution that has a concentration of Na^+ ions of 1.50 \it M?
The iron in a 1.0000g rock sample is dissolved, reduced to Fe+2 and titrated with dichromate. If the titration requires 12.40ml of 0.5000 Normal dichromate, what is the percentage of Fe2O3 in the sample?
Assuming the surroundings to be at 75 °F, determine the a) amount of heat transfer between the source and the refrigerant and b) exergy destroyed during this process.
If the size of the positive charge value is tripled for both of two point charges, to maintain the same mutual force between them what would be the ratio of old to new distance between the two point charges?
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Explain the risks of not reporting the results of your forensic assessment findings accurately. Provide specific examples.
Read "The Effect of Tart Cherry Juice Compared to a Sports Drink and Cycling Exercise Performance, Substrate Metabolism, and Recovery" from University Library
Identify and analyze one resource that provides information regarding services for dealing with and treating substance use and abuse in youth or adolescence.
Discuss how culture may influence one's perceptions. Provide an example of how culture may impact the interaction between a patient/client
Write an essay describing your achievement of a goal and your friends or family member's achievement of a goal using motivational theory
Pets can have a therapeutic effect on people; they seem to have the power to calm the anxious and cheer the depressed. Give three reasons
Review Chapter 12 and consider how your culture has impacted your worldview and personality. Pay particular attention to the section on characteristics of Cult