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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.)
Question: Resultant of two forces P & Q is R. If Q is doubled R is doubled while if Q is reversed R is again doubled. Show that P:Q:R=(2) 1/2 :(3) 1/2 :(2) 1/2 .
two forces of 20 units and 30 units act at right angle what is the magnitude of resultant force
Describe the theory of black body. Black body At an exact temperature the black body would produce the maximum amount of energy probable for temperature. This would emit at
6.1 moles of steam at 100 o C are condensed at 100 o C and the resulting water is cooled to 47.1 o C. Calculate the entropy change for this process. (The molar heat capac
Demonstrate the typical ultrasonic flaw detector in transmission mode? A typical ultrasonic flaw detector into its transmission mode is as demonstrated below. In this w
An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: a) momentum but not energy b) neither moment
Example of an impure spectrum
Manganin is an alloy of (A) Copper, manganese and nickel. (B) Copper and manganese. (C) Manganese and nickel. (D) Manganese, aluminium and nickel. Ans:
Josephson effects (B.D. Josephson; 1962) Electrical effects observed while two superconducting materials are separated through a thin layer of insulating material.
Trojan points: It is L4 & L5, the two dynamically stable Lagrange points (under certain conditions). Trojan satellites: This is the satellites that orbit a body at o
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