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1. Josh and Pete are resting on top of the water near the end of the pool when Josh creates a surface wave. The wave travels the length of the pool and back in 25 seconds. The pool is 25 meters long. Determine the speed of the wave.
2. While hiking through a canyon, Jack lets out a scream. An echo (reflection of the scream off a nearby canyon wall) is heard 1.3 seconds after the scream. The speed of the sound wave in air is 345 m/s. Calculate the distance from Noah to the nearby canyon wall.
3. An automatic focus camera is able to focus on objects by use of an ultrasonic sound wave. The camera sends out sound waves which reflect off distant objects and return to the camera. A sensor detects the time it takes for the waves to return and then determines the distance an object is from the camera. If a sound wave (speed = 340 m/s) returns to the camera 0.150 seconds after leaving the camera, how far away is the object?
The wind exerts on a flower the force 0.755 N horizontally to the east. Find the vector torque of the wind force about the base of the stem
A 3-kg object initially traveling at 6 m/s in the negative x direction collides and sticks to a 4-kg object traveling at 2 m/s in the positive y direction. find the magnitude of the velocity of the combined objects
Determine the magnitude of the force experienced.
A 5.1 kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket.
Two people with a combined mass of 123kg hop into an old car with worn-out shock absorbers. Find the total load supported by the springs
Freddy and his girlfriend are climbing in the CanadianRockies. The start from an elevation of 681 meters above sealevel. What is their average vertical velocity downhill
visible light of wavelength 480 nm is incident on a diffraction grating with a slit spacing of 0.003 nm. how many
A proton travels with a velocity of v = (1.5 x 10^5)m/s i + (4.0 x 10^5)m/s j ? and then enters a magnetic field B = (1.5T)i? . Describe the motion the proton will experience
A concave mirror has a radius of curvature of 5.5 centimeter. Find the object position for which the resulting image is upright and five times the size of the object
A challenge gaining prominence throughout the planet is the increased need for \"green\" or sustainable energy. how much energy does the wind turbine generate
A 28.0-kg block is connected to an empty 2.46-kgbucket by a cord running over a frictionless pulley. Calculate the mass of sand added to the bucket
An object is placed two focal lengths from a diverging lens. What is the magnification and location of the image.
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