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A trains whistle is a pipe thats open at only one end is emitting a sound at its second overtone. The train is moving at 75 meters per second towards a train station. You are standing at the train station and hear the whistle at a frequency of 4000 Hz. What is the length of the whistle in centimeters?
freight car with mass of 25000 kg rolls down an inclined track through a vertical distance of 1.5 m. What percentage of the initial kinetic energy is lost
A spring (70 N/m) has an equilibrium length of 1.00 m. The spring is compressed to a length of 0.50 }, how far up the slope will the mass move before coming to rest
A mass m equals 4 kg on a slanted surface theta equals 30 degrees. A light rigid cord runs from mass m to pully beta equals 1/2, calculate the magnitude of the systems acceleration
How fast must the car be travelling just as it leaves the cliff in order to clear the river and land safely on the opposite side.
On an amusement park ride, passengers are seated in the horizontal circle of radius 6.5 m. The seats begin from rest and are uniformly accelerated for 24 seconds to a maximum rotational speed of 1.4 rad/s.
An object moves with constant acceleration 4.45 m/s2 and over a time interval reaches a final velocity of 12.4 m/s. If its initial velocity is 6.2 m/s, what is its displacement during the time interval
three 0.04 kg particles have been glued to a rod of length L = 13 cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate
The observer on the right, sees two final images. One image comes directly from the objet. The other images comes from the reflection of the object in the mirror. What is the focal length of the concave mirror
1.0 kg of ice at temperature T' = 0 oC is melted into water at the same temperature by placing it in contact with a reservoir at temperature T = 22.1 oC. What is the change in the entropy of the universe to two decimal places
Three blocks, each of mass 14.0 kg are on a frictionless table. What is the net horizontal force on block A
A skier starts down a 26 slope. After a vertical drop of 28 m, the slope temporarily levels out and then drops at 19 an additional 39 m vertically before leveling out again. What is the skier's speed on the lower level stretch
A typical fighter pilot can withstand a sustained force equal to seven times his weight before losing consciousness. What is the smallest radius turn that he can make
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