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A source of sound having a frequency of 330 Hz is moving at 25m/s. If the speed of sound in air is 340 m/s what is the frequency of sound heard by (a) someone in front of the moving source; (b)someone behind the moving source?
You throw a ball straight into the air from a height of 4 feet and with a speed of 5.02 m/s, How far are you from the ball, the moment it hits the ground
a parallel-plate capacitor has capacitance 9.50microf.a how much energy is stored in the capacitor if it is connected
A 740 N diver drops form a board 9m above the waters surface. The acceleration of gravity is 9.81m/s^2. Find the diver's speed 4.7m above the water's surface
A beam of neutrons that all have the same energy scatters from the atoms that have a spacing of 9.30×10^?2nm in the surface plane of a crystal
How is the voltage divided among resistors in parallel and What happens to resistance when resistors are connected in parallel
What is the number of turns on the coil and what is the magnetic field at the mean radius?
A bale of hay sits on the bed of a trailer. The trailer is starting to accelerate forward, and the bale is slipping toward the back of trailer. What would a force diagram and a free-body diagram look like for the above situation.
The generator in a purely capacitive AC circuit has an angular frequency of 126? rad/s and a maximum voltage of ?Vmax = 129 V. what is the RMS current in the circuit
A rock is thrown from the roof of a building, with an initial velocity of 10.0 m/s at an angle of 30.0 ° above the horizontal. What is the height of the building
A diver releases an air bubble of volume 2.9 cm3 from the depth of 18 m below the surface of a lake, where the temperature is 7.2°C. What is volume of the bubble when it reaches just below the surface of the lake, where the temperature is 22°C.
Find the radius of an electron's orbit when it moves perpendicular to a magnetic field of 0.56 with a speed of 6.29×10^5 m/s
When the electric power was turned off, the electric motor originally running at 1800 rpm comes to rest in 15.0 s. Find out the angular acceleration, the angular velocity at the end of 5.0 s, and the total angle turned through in 15.0 s.
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