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What is the wavelength (in m) of a 8 KHZ sound wave in a material where the speed of sound is 1540 m/s?
On Mars, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock falls about d meters during the first t seconds of its fall. Assuming the rock does not hit the ground first, how far will it fall during t..
A 2100 kg car moving east at 10 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35 ° north of east and at a speed of 5.03 m/s. Find the speed of the 3000 kg car before th..
A ball is shot from the ground into the air. At a height of 10.60 m, the velocity is observed to be v = (8.60 m/s) i + (6.50 m/s) j
neglect air resistance for the following. a soccer ball is kicked from the ground into the air. when the ball is at a
A 94.0 cm pendulum is released from a small angle. After 113 oscillations the amplitude is one half of its original value. The damping is proportional to the speed of the pendulum bob. Find the value of the damping coefficient, ?, (in Hz).
Ohm's Law isvalid when for a given piece of material the ratio V/I is the samefor a wide range of voltages and currents. For anOhmic conducting material the resistivity depends on the electricfield and the current density. Acurrent of 0.5 A exists in..
Suppose each red ball weighs 20 lbs. Find the potential energy (PE) for each ball on each ramp. In this lab mass is given in pounds and height is in feet, so use 32.2 ft/sec2 as the gravitational constant. Your answer will be in foot-pounds since ..
an induction roller coaster can accelerate a train from zero to 27m/s in 2.5 seconds. What is the average force exerted on a 68kg rider
When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp.
A stone is dropped from the top of a cliff. The splash it makeswhen striking the water below is heard 7.6 s later. How high is the cliff
Two 1.8 V. batteries are connected together in series to a bulb whose resistance is 50 ohms. How many electrons leave each battery per minute
A car is traveling down around a banked curve in the road. The curve has a radius of 300 m and is banked at an angle of10.0o. (a) At what speed is no friction required? (b)Suppose it is snowing and the coefficient of friction is 0.2, what are the ..
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