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When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. One of the trains moves at 30.5 m/s, and the observer hears a beat frequency of 2.9 beats per second. What is the speed of the second train, which travels faster than 30.5 m/s?
Three identical metal spheres are charged so that sphere A has a charge of 220 ?C, sphere B has a charge of -370 ?C, What is the final charge on each sphere
Analyze various philosophical approaches for ethical decision making, and the effectiveness and limits of each approach for making ethical choices and
Two runners compete in a race of 10.04 km. One runner has a steady speed of 11.14 km/h. What is the difference in time for the two runners
A football player runs the pattern by the three displacement vectors, , and . The magnitudes of these vectors are A = 4.00 m, B = 18.0 m, and C = 16.0 m. Using the component method, find out the (1) magnitude and (2) direction of the resultant vec..
The electric field on the x-axis due to a point charge fixed at the origin is given by E=(b/x^2)i, Find the magnitude and sign of the point charge
A motor develops 0.75 kW of power at 2000 revs per 10 min. What torque is applied to the motor shaft
Atennis ball of mass 5.5*10-2and a speed of 39 M/s strikes a wall at a 45 degree angle, what is the direction of of the balls impuse in relation to the wall
A very long, hollow cylinder (radius 4.7cm) is formed by rolling up a thin sheet of copper, Use Ampère's law to find the magnetic field outside the cylinder at a distance 6.8cm from the axis
What are the magnitudes of forces that act upon links? What is the tension in the rope and one end of the catenary is fixed to the left pole. Massless rope of length l connects second end of the catenary and the second pole.
A -3.07 ?C charge is placed at the center of a conducting spherical shell, Calculate the total charge on the outer surface of the conductor
What is acceleration of the elevator
A 5.78 cm long rod in the shape of a rectangular solid has cross section dimensions 28.7 mm x 42.6 mm. What is the current in the block
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