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Many years ago the Federal Communications Commission (FCC) assigned Microwave Ovens two different operational frequencies. Some of the very old microwave ovens used a frequency of 915 MHz rather than the current 2450 MHz that is almost exclusively used in ovens today. What is the wavelength, photon energy and wave speed of this type of electromagnetic radiation?
A negative charge orbits a positive charge. The orbit is a perfect circle, What is the period of the orbit of the negative charge
A garden hose has an internal diameter of 1.5 cm. It's connected to a sprinkler that consists merely of an enclosure with 14 holes, At what speed does it leave the sprinkler
a small aircraft is headed due south with a speed of 57.8 m/s with respect to still air. Determine the directional angle is relative to due south
A 650-N physics student stands on a metric bathroom scale inside an elevator. The elevator (including the student) has a total mass of 875 kg. What is the tension on the elevator cable in both cases
The nucleus 124 55 Cs has a half-life of 30.8 s and a molar mass of 124 g. What is the initial activity (decay rate) of the sample
A car starts from the origin and is driven 1.1 km south and then 3.5 km in a direction 53° north of east. what is the car's final location
Water at a gauge pressure of 3.0 atm at street level flows into an office building at the speed of 0.40 m/s by a pipe 5.0 cm in diameter. The pipe tapers down to 2.20 cm in diameter by the top floor, 15 m above, where the faucet has been left open. E..
a balloon contains 4.20 moles of a monatomic ideal gas. As energy is added to the system by heat, find work Wenv done by the gas in expanding the balloon
A caterpillar climbs up a one-meter wall. For every 3 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Compute the speed at which the caterpillar travels.
A rock is thrown vertically upward with an initial speed of 100 ft/s. At the same instant another rock is thrown vertically downward from the top of a 280 ft cliff with an initial speed of 40 ft/s. Find the time when the rocks pass each other
Television stations broadcast in VHF and UHF (VHF is very high frequency). The VHF bands for digital broadcast lie within the frequency range of 54.0 MHz and 216 MHz. What is the broadcast frequency range for channel
You hold a spherical salad bowl 90 in front of your face with the bottom of the bowl facing you. The salad bowl is made of polished metal with the 30 radius of curvature. Where is the image of your 2.0 tall noses located.
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