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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.)
what is the physics principle involved in the lens maker equation
There are several conditions for formation of cat ions ? Low Ionisational potential ? Lesser Charge ? More atomic size of atoms forms cations easily ? Ions having Inert
Q. Measure of elapsed period using the SI unit? Answer:- 1. This is the question that each true scientist dreads to be asked especially in a public setting by extremely in
to measure the extension of an experimental wire due to different pulling forces using searle''s apparatues.hence, determine the young modules of the material of the wire.
Q. A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40°.What is t
Q. Define Specific Gravity? Answer:- Specific Gravity SG is a unit fewer quantities that gives the scientist or engineers an idea of how dense a substance is compared to w
If the resultant force acting on a body of constant mass is zero, the body's momentum is: a) Increasing b) Decreasing b) Always zero d) Constant Ans: If
BCS theory (J. Bardeen, L.N. Cooper, J.R. Schrieffer; 1957) A theory put forth to describe superconductivity and superfluidity both. This recommend that in the superconducting
A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the left of vertical. Which of the following answers could de
A standing wave is formed on a tightly stretched string. The distance between a node and an antinode is: w) 1/8 wavelength x) 1/4 wavelength y) 1/2 wavelength
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