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A train sounds its whistle as it approaches and leaves a railroad crossing. An observer at the crossing gauges a frequency of 219 Hz as the train approaches and a frequency of 184 Hz as the train leaves. The speed of sound is 340 m/s. Discover the speed of the train and the frequency of the whistle.
A 110 kg mail bag hangs by a vertical rope 4.0 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. As the bag is moved to this position, how much work is completed by t..
When the current in a toroidal solenoid is changing at a rate of 0.0260 A/s, the magnitude of the induced emf is 12.6 mV. How many turns does the solenoid have
A cylinder with a piston contains 0.250 mol of oxygen at 240000 pascal and 355 kelvin. The oxygen may be treated as an ideal gas. The gas first expands isobarically to twice its its original volume. It is y then compressed isothermally back to its..
A 180 g copper bowl contains 185 g of water, both at 20.0°C. A very hot 300 gcopper cylinder is dropped into the water, causing the water toboil, with 4.80 g being converted tosteam. The final temperature of the system is 100°C. Neglectenergy tran..
An object is viewed through a 35 cm thick tank of water (n=1.33) at an angle of 30 degrees from parallel to the tank surface. what is the apparent displacement the object from its actual location
a simple pendulum with a length of 1.93 m and a mass of 6.54 kg is given an initial speed of 2.46 ms at its equilibrium
a dolphin jumps with an initial velocity of 11.0ms at an angle of 44.0 degrees above the horizontal. the dolphin passes
Calculate the angular momentum of a solid uniform sphere with a radius of 0.130m and a mass of 14.0kg if it is rotating at 6.05rad/s about an axis through its center
A 69 kg boy and a 40 kg girl use an elastic rope while engaged in a tug-of-war on an icy, frictionless surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find out the magnitude of the acceleration of the boy toward the girl.
an object 9mm tall is placed 12cm to the left of the vertex of a convex spherical mirror whose radius of curvature has
A voltage ?v = (110 V) sin ?t (in SI units) is applied across a series combination of a 1.92 H inductor, a 12.5 µF capacitor, and a 12.8 O resistor. Calculate the power at that frequency
You create a plot of T2 (in s2) vs. L (in m) and the linear fit of your graph gives a slope of 3.7484 ± 0.0069. What is the value of the local gravitational constant, g?
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