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On a hiking trip, you are walking through a canyon with vertical walls and are closer to one wall than the other. Having taken Physics, you decide to determine the width of the canyon by using your knowledge of kinematics and the speed of sound. You shout "Hey" as loud as you can, and after a short time you hear three echoes. The second echo arrives 1.7 s after the first, and the third echo arrives 0.3 s after the second. Assuming that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, find the width of the canyon.
A boy is standing on a frozen lake (i.e. no friction) holding a rope that is attached to his sled. He pulls on the rope and exerts a horizontal force of 5.2 N, What is the acceleration of the boy
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.5 kg*m^2. Calculate the initial and final kinetic energy of the system
A sodium surface, which has a work function of 2.46eV is illuminated with a wavelength = 300nm light. What is the deBroglie wavelength of these electrons
A uniform charged disk of radius 30.0cm carries charge with a density of 8.00x10^-4 C/m^2. Calculate the electric field on the axis of the disk at
A dodgeball with mass 594.9 g is thrown directly at him with a speed of 22.43 m/s. He catches the dodgeball and then moves with a speed of 0.2635 m/s. What is the mass of the boy
Converging lens with plane mirror box somewhere at the left on central axis of converging lens. What is distance between box and lens
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 14.5 cm. Find the initial velocity of the ball before the collision
An infinitely long wire is formed as in the diagram on your assignment. It is formed so that it has a circular portion of R = 50cm and the straight portion is located at a distance r from the center of the circular portion. Determine r (in cm) suc..
At one time, television sets used "rabbit-ears" antennas. Such an antenna consists of a pair of metal rods. The length of each rod can be adjusted to be one-quarter of a wavelength of an electromagnetic wave whose frequency is 125 MHz. How long is ea..
Calculate the amount Stansfield should report as net cash provided (used) by financing activities in its 2010 statement of cash flows. (Enter amount as positive.)
A block of mass 1 kg is on a turntable 0.5 m from the center of the turntable. Find the angular speed of the turntable as a function of time
A series RLC circuit has a resistance of 24 ? and an impedance of 105 ?. what average power is delivered to the circuit
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