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1. Sodium atoms emit 2.10 eV photons. What is the frequency of these photons? What is the wavelength? What is their speed in a vacuum?
2. Two sound waves (both having a 1.2 m wavelength) interfere with one another. The path-length difference is 2.4 m. What is the interference condition? Constructive or destructive? Breifly explain.
Is the answer destructive since the path length difference is half the wavelength of the two sound waves?
A patient recovering from surgery is being given fluid intravenously. The fluid has a density of 1040 kg/m3, and 9.54 10-4 m3 of it flows into the patient every five hours. Find the mass flow rate in kg/s
Bowling balls can be made from a vaiety of substances and are required to have a circumference of roughly 27.6 inches. calculate the thickness of the shell
You clamp a straight ramp of length 51 cm making an angle of 18.0° with the horizontal table top, What time elapses from when the car leaves the ramp until it reaches the floor
In compressing the spring in a toy dart gun, 0.4 J of work is done. What is the dart's kinetic energy as it leaves the gun
If you wish to lose weight, you may rub a balloon on your head. If you charge the balloon to a charge of q = -1.23µC, how much weight did you lose
A distant galaxy emits light that has a wavelength of 500.7 nm. On earth, the wavelength of this light is measured to be 503.7 nm. Decide whether this galaxy is approaching or receding from the earth.
A 0.316-m-thick sheet of ice covers a lake. The airtemperature at the ice surface is -17.5 °C. Calculate the number of millimeters by whichthe ice thickens
wheel rotating about a fixed axis has an angular position given by , where q = 3 - 2t^3 tis measured in radians and t in seconds
Hot water at 90 degrees C is poured into a large Styrofoam cup that contains water at 20 degrees C. calculate the ratio of cold water to hot that would give this result. Start with energy conservation: Q(H) + Q(C) = 0
Biologists think that some spiders "tune" strands of their web to give enhanced response at frequencies corresponding to those at which desirable prey might struggle.
A sheet of glass having an index of refraction of 1.40 is to be coated with a film of material having an index of refraction of 1.55 in order that green light with a wavelength of 525 nm (in air) will be preferentially transmitted via constructive in..
an alpha particle has a charge of 2.00e. how much work is required to move this particle across a potential difference of 2270 volts?
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