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Two trains on separate tracks move toward one another. Train 1has a speed of 140 km/h, train 2 speed of 55.0 km/h. Train 2 blows it shorn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345m/s.)
A "balloon rocket" is a balloon suspended from a taut wire by a hollow tube (drinking straw) and string. The nozzle is formed of a 1-cm-diameter tube, and an air jet exits the nozz
Moment of Thin Spherical Shell About Axis This problem can be set up in spherical coordinates so that conversions from Cartesian coordinates are not required. The mass element
Q. Explain Rayleigh's criterion of just resolution of two spectral lines of equal intensities giving suitable intensity distribution carves. Show how the resolving power of a pla
Gamma Rays: The wave length of gamma rays is less than 10-11 m.
Length contraction
Q. A 4.5cm needle is placed 12cm away from a convex mirror of focal length 15cm. Give the location of the image and the magnification. Describe what happens as the needle is moved
what is the difference between diplacement and distance
The voltage across the terminals of a cell when it is supplying current to external resistance is known as potential difference or final voltage. Potential energy dissimilarity is
what is the importance of si unit
defination of multples and sub multiples
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