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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.)
two free charges +q and +5q are a distance L apart. A third charge is placed so that the entire system is in equilibrium.find the location and magnitude and sign of the charge.
What is the Law of Machines? Machines which are used to lift a heavy load are governed by the "Law of machines", which says that the effort to be applied on the machine (p) is
Alpha particles are nuclei of: a) Hydrogen b) Helium c) Oxygen d) Nitrogen Ans: Alpha particles are nuclei of helium.
IN SUCCESSIVE DISINTEGRATION WHY DOUGHTER ELEMENT NOT DECAY WHEN IT FORM BUT DECAY AFTER A FIEW TIME FROM ITS FORMATION
a tiny air bubble inside a glass slab appears to be 6 cm deep when viewed from one side and 4 cm deep when viewed from other side. find the thickness of slab
what project can i make that includes induction heating
A 415V 3-phase a.c. motor has a power output of 12.75kW and operates at a power factor of 0.77 lagging and with an ef?ciency of 85%. If the motor is delta-connected, verify
The angular position of a point on the rim of a rotating wheelies given by theta=4.0t -3.0t2 +t3, where theta is in radians and tis in seconds. What are the angular velocities at a
An object in free fall has an acceleration of 9.80 m/s 2 assuming that there is no air resistance. What is the speed of an object dropped from the top of a tall cliff 3.50 s a
Q. Movement of principal ray? In every case a principal ray moves from the head of the object to the plane of the lens. It passes through the plane of the lens as well as conti
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