Batteries are always labeled with their emf; for instance, an AA flashlight battery is labeled '1.5 volts'. Would it be appropriate to put a label on batteries stating how much current they provide? Why or why not?
Two coherent sources A and B fo radio waves are 5m apart. Each source emits a wave with a wavelength 6m. Consider points along the line between two sources, at what distances, if any, form A is the interference constructive.
Discuss the physiological significance of auxins.
Describe Michelson's method for determining the speed of light.
What is Doppler's effect? Find the change in the frequency when an observer moves towards a stationary source and then moves away from the source.
What is the threshold of human hearing? Define one bel.
A source of sound produces a note of 512 Hz in the air at 17C with a wavelength of 66.5 cm. Find the ratio of molar heat capacities at constant pressure to constant volume at NTP. Densities of air and mercury at NTP are 1.293 kg.m3 respectively.
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