What is the frequency measured by the observer
Suppose a toy oscillated with a frequency of 500 Hz and hence a period of 0.002s. If the toy moves past an observer at 0.9c, what is the frequency as measured by the observer?
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Although all atoms have moving electric charges, not all materials are magnetic (for example, copper or wood are not magnetic). Why, then, aren't all materials magnetic?
A telescope consists of a mirror with radius of curvature 6.5 m and an eyepiece. If an astronomer would like the telescope to have a magnification of 114, what focal length eyepiece should he use?
What is the minimum pump power required to increase from the pressure of saturated water at 2 kPa to pressure of water at 2 MPa with a mass flow rate of 10 kg/min?
The lens of a slide projector with a focal length of 100.0 mm projects a slide onto a screen that is 10.0 m away. How far from the lens must the slide be placed to form a sharp image on the screen? (in cm)
Light of wavelength 679 nm is incident on a single slit. The central bright fringe is 2.75 cm wide on a flat screen that is 81.4 cm from the slit. What would be the width of the central bright fringe if the wavelength were 474 nm?
The input to a 12-bit AD converter is Vin = Asin(2 omega t) + 2Acos(2 omega t) and its f = 20 kHz. Find the sampling time interval and aperture time for this A/D conversion.
Light of wavelength 696 nm is incident on a single slit. The central bright fringe is 2.64 cm wide on a flat screen that is 94.8 cm from the slit. What would be the width of the central bright fringe if the wavelength were 451 nm?
a particle with spin 1 has orbital angular momentum l=0. what are the possible values for the total angular momentum quantum number j?
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