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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 car with an initial speed of 24.5 km/hr accelerates at a uniform rate of 0.98 m/s^2 for 5.6sec. find the final speed and displacement of the car during this time.
(a) Show that the total power in a 3-phase, 3-wire system using the two-wattmeter process of measurement is given by the sum of the wattmeter readings. Illustrate a connection diag
Q Define: self inductance. The coefficient of self induction of a coil is numerically equivalent to the opposing emf induced in the coil when the rate of change of current thr
A helium nucleus and a neon nucleus are separated by a distance of 3.0 nm. The charge of the helium nucleus is +2e while that of a neon nucleus is + 10e .Find the magnitude of the
a) Explain the magnetic effects of current? b) Do the diagram to show the direction of motion of the conductor:
Thermistors Insulators and semi-conductors behave in a different way when the temperature increases, because their resistivity decreases. That is: the resistance of an insulato
Evaluate the speed will the string break A certain string just breaks when it is under400N of tension. A boy uses this string to whirl a 10-kgstone in a horizontal circle of rad
Larry's gravitational potential energy is 1870Jas he sits 2.20 m above the ground in a sky diving airplane. What is Larry's gravitational potential energy when he begins to jump fr
Explain Cement concrete Cement concrete is a mixture of cement, sand, pebbles or crushed rock and water, which where placed in the skeleton of forms and permitted to cure becom
There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a
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