Physics, 21.07.2019 12:30, jcross11nate

Describe how the doppler effect explains why an approaching fire engine's siren has a high pitch?

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Physics, 21.06.2019 22:20, kl8774

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Physics, 21.06.2019 22:30, dyamondgeorge1oy4nex

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

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Physics, 22.06.2019 01:50, edgardo34

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

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Physics, 22.06.2019 03:30, ashah1260

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.