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Two trains on separate tracks move toward one another. Train 1 has a speed of 100 km/h, train 2 a speed of 60.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Suppose the speed of sound is 345 m/s.)
A woman on a bridge 97.0 m highsees a raft floating at a constant speed on the river below. Shedrops a stone from rest in an attempt to hit the raft. Find the speed of the raft
A point charge of +3.0 μC is located at the origin of a coordinate system, and a second point charge of -6.0μC is atx= 1.0m. At what point on the x axis is the electrical potential zero?
Draw a motion diagram for the train. Assume that the train is moving toward the right and starts to slow down at t = 0. The separation of each dot represents an elapsed time of one second.
a 1.0-cm-tall object is 60 cm in front of a diverging lens that has a -30 cm focal length. calculate the image position
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm. what's the balloon's new radius
A square wire carrying a current of 5 A has sides of 10 cm and is placed in the yz plane. The torque on the square is
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
A string has a linear density of 6.80 10-3 kg/m and is under a tension of 345 N. Determine the speed of the traveling wave
after flying for 15 min in a wind blowing 42 kmh at an angle of 20o south of east an airplane pilot is over a town that
consider a collection of three point charges. two equal charges q1 q2 3.0 nc are on the x-axis at the points x 4.0 cm
A uniform 7.6 ladder is leaning against a frictionless vertical wall, with which it makes a 15 angle. how massive a person would make the ladder slip
how many electrons should be removed from an initially uncharged spherical conductor of radius 0.200 m to produce a
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