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Find the quantum ( photon) energy associated with a 650.kHz AM radio signal.
A car, with it's horn producing 480.Hz, is traveling 40.0mi/h away from you (standing still). What frequency do you hear, given the speed of sound is 1090.ft/s ?
If a 20dB sound level (ticking clock) is replaced by 80dB (garbage disposal), by what factor has the sound intensity been multiplied?
A catapult consists of a rubber of unstretched length, 0.20m. The rubber is stretched by 0.10m by a tension of 50N. A stone of mass 0.06Kg is projected vertically upwards from the catapult after the rubber has been stretched to a total length of 0.35m. Calculate the energy stored in the stretched catapult and determine the maximum height reached by the stone.
4.5m of air a gauge pressure 46.kPa undergoes an isothermal expansion to where the gauge pressure drops to 13.kPa. Calculate the final volume in m3
1270.cm of propane at 18.0°C are heated and allowed to expand to 1530.cm through an isobaric process. Calculate the final temperature in °C.
How many calories of heat need to be extracted from 200.g of steam at 120.°C to change it into ice at --12.0°C ?
The plates of a parallel – plate capacitor uses a disk with a radius of 10mm. The separation distance between the plates is 100 nm and between the plates is a sheet of mica. What is the capacitance of the capacitor?
An ambulance driving 20.0 m/s emits a sound wave with a frequency of 500 Hz. As it drives away from a hospital, which of the following is the only possible frequency heard by the medical staff who are standing at the entrance?
Why is the orbit of the telescope stable nonetheless? What otherforces need to be considered?
