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A train is traveling at 30.0 relative to the ground in still air. The frequency of the note emitted by the train whistle is 262 . The speed of sound in air should be taken as 344 . What frequency is heard by a passenger on a train moving at a speed of 18.0 relative to the ground in a direction opposite to the first train and approaching it? Express your answer in hertz. What frequency is heard by a passenger on a train moving at a speed of 18.0 relative to the ground in a direction opposite to the first train and receding from it? Express your answer in hertz.
A 6.0kg crate is pushed from the top of an incline and travels down the incline with an initial speed of 8m/s.find loss of potential energy
A train moving with constant velocity travels 190 north in 11 and an undetermined distance to the west. How far west has the train traveled in this time
A wire has a length of 6.80 10-2 m and is used to make a circular coil of one turn. evaluate the maximum torque that this coil can experience
question1a bridge truss extends 200m across a river. the structure is free to slide horizontally to permit thermal
A vertical solid steel post of diameter d = 24cm and length L = 2.10m is required to support a load of mass m = 8200kg. What is the strain in the post
The drawing shows two long, straight wires that are suspended from a ceiling. The mass per unit length of each wire is 0.047 kg/m. What is the current in each wire
A soccer player kicks a rock horizontally off a 39.0-m-high cliff into a pool of water. If the player hears the sound of the splash 2.97 s later, what was the initial speed given to the rock? Assume the speed of sound in air is 343 m/s.
H-F molecule has spring constant of 970 N/m. Assume that an H-F chemical laser, which lases betwee vibrational states of the H-F molecule, how many photons per seconde does it emit
A series RLC circuit with R = 12.5 omega, L = 56.0 mH and C= 0.022 MuF is driven by an AC generator with voltage amplitude of 10.0V and an adjustable frequency. At what frequncy will the current amplitude from the generator be the greatest? Find th..
A large storage tank, open to the atmosphere at the top and filled with water, Determine the speed at which the water leaves the hole
The scale of a spring balance that reads from 0 to 15.0 kg is 12.0 cm long. How much does the package weigh
The power stroke of the myosin protein on an actin filament that generates tension in a muscle appears to be a 10 nm displacement generated by about a 1 pN force. How much work is done by one myosin in a single power stroke
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