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Electronic flash units for cameras contain a capacitor for storing the energy used to produce a flash. In one such unit the flash lasts for 0.00129 s with an average light power output of 1,657 W. If the conversion of electrical energy to light is 95% efficient (the rest of the energy goes to thermal energy), what is the capacitance? Assume the camera batteries can create a potential difference of 12 V between the capacitor plates. (answer in F.)
If a particle that had a charge q=6 micro C and mass 0.2 grams that moves in an uniform external electric and also magnetic fields that are E= ( 2Î +3? +9?) N/C, what is the magnitude of the particles acceleration
What is the wavelength of the spectral line? B) Assuming this line is from a transition from level n1 = 3 to level n2 = 2 (i.e. the longest wavelength Balmer series transition), what do you calculate for the value of Rydberg constant.
A bicycle wheel of radius 0.6 m is spinning at a rate of 120 revolutions per minute. What is the period of the wheel's motion
An explosion of a 10.0-kg bomb releases only two separate pieces the bomb was initially at rest and a 4.00-kg piece travels westward at 100 m/s immediately after the explosion
what the torque increase or decrease as the angle increase. Calculate the magnitude of the torque.
A constant torque of 21.4 N•m is applied to a grindstone whose moment of inertia is 0.125 kg•m2. Using energy principles, determine the angular speed (in revolutions per second) after the grindstone has made 19 revolutions. (Avoid friction.) Do no..
A magnifying glass has a converging lens of focal length of 18.80cm. At what distance from a nickel must you hold this lens to get an image with a magnification of +2.47.
A 10.0 cm radius piston compresses a gas isothermally from a height of 15.0 cm to 2.50 cm at a constant pressure of 2.0 atm. How much heat was added to the gas
In a ballistics test, a 21 bullet traveling horizontally at 1400 goes through a 25--thick 370 stationary target and emerges with a speed of 930 . The target is free to slide on a smooth horizontal surface. What is the target’s speed just after the bu..
A boat moves slowly inside a marina with a constant speed of 1.50 m/s. How fast is the boat moving after accelerating for 5.00s
A cue stick hits a cue ball with an average force of 23.8 N for a duration of 0.0246 s. how fast is it moving after being struck
The central star of a planetary nebula emits ultraviolet light with wavelength 104nm. What is the first-order diffraction angle
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