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A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 240 Hertz. A person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker.
Determine how fast should the platform move for the person to detect a beat frequency of 2.0 Hertz? Take the speed of sound to be 344 m/s.
A 5.00-nF capacitor charged to 60.0 V and a 7.00-nF capacitor charged to 40.0 V are connected with the negative plate of each connected to the negative plate of the other. What is the final charge on the 7.00-nF capacitor? Would these capacitors be c..
a 25 kg box is acted on by a 45 n horizontal force. if the box accelerates at a rate of .75 ms2 what is the coefficient
A load of bricks with mass = 15.8 hangs from one end of a rope that passes over a small, frictionless pulley. What is the tension in the rope while the load is moving
When a 0.15 kilogram ball is hit, its velocity changes from +29 m/s to -29m/s. Find the magnitude of the impulse delivered on the ball by the bat
On a frictionless, horizontal air track, a glider oscillates at the end of an ideal spring of force constant 4.00. Find the maximum force the spring exerts on the glider
in 1971 astronaut alan shepard took a golf club to the moon where the acceleration due togravity is about g6. if he
At a given instant, a particle with a mass of 4.50 x 10-3 kilogram and a charge of 3.60 x 10-8 C has a velocity with a magnitude of 1.50 x 105 m/s in the +y direction. Obtain the direction of the magnetic force on the particle
Your cup of coffee is too hot to drink when served at 95.0. What is the mass of an ice cube, taken from a -23.0 freezer, that will cool your coffee to a pleasant 59.0
Having taken a nap under a tree only 20 m from the finish line, Rabbit wakes up to find Turtle 19.5 m beyond him, grinding along at 1/4 m/s. If the bewildered hare can accelerate at 9 m/s2 up to his top speed of 16 m/s (36 mi/h) and sustain that s..
A magnetic field of 1.1 T is perpendicular to a square coil of 14 turns. The length of each side of the coil is 5 cm. Find the magnetic flux through the coil
A ping-pong ball has an average density of 0.0840 g/cm3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water
you push with a horizontal force of 56.0 against a 25.0 box pressing it against a rough wall to hold it in place. the
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