2. Two of the stable isotopes of mercury are 198Hg and 202Hg. These isotopes emit slightly different wavelengths of light, 546.07532nm and 546.07355nm, respectively. To identify which isotopes are included in a sample of mercury, we can shine the light on a diffraction grating with a screen 4m away. How far apart are the first-order bright fringes on the screen if the diffraction grating has 4,000 lines per centimeter
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Physics, 22.06.2019 02:00
The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.
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Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 23.06.2019 05:00
Acid rain is caused by human activity. select the best answer from the choices provided t f
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Physics, 23.06.2019 07:20
Aseries circuit has a battery and resistor and a light bulb with a power of 3.0 w if the current in the circuit is 0.90 a over a period of 20 seconds what is the voltage across a lightbulb
Answers: 1
2. Two of the stable isotopes of mercury are 198Hg and 202Hg. These isotopes emit slightly different...
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