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Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440 Hz. A second player sounds the same note and hears that her instrument is slightly "flat" (i.e., at too low a frequency). Playing at the same time as the first flute, she hears three loud-soft-loud beats per second. By how much she must shorten her flute to bring it into tune? Assume a speed of sound of 350 m/s.
There are 3 force vectors acting upon a central mass of m = 2.5 kg. What is the magnitude and direction of the acceleration
A sled of mass 5.37 kg is coasting along on a frictionless ice-covered lake at a constant speed of 1.13 m/s. At what speed does the sled move once the book is on it
find the magnitude and direction of the impulse delivered to the ball by the floor.
On vacation, your 1250 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.75 m/s2. What is the net force exerted on the trailer
A large wheel-shaped space station, 120 m in diameter, Find the rotational frequency of the wheel
Air enters an insulated turbine operating at a steady state at 5 bar, 1000K and exits at 1 bar, 500K. Neglecting KE and PE changes and assuming ideal gas behavior, find whether the expansion is internally reversible, irreversible or impossible.
A potential difference of 13 V is found to produce a current of 0.45 A in a 2.7 m length of wire, Find the resistance and resistivity of the wire
a 15 m beam is supported (hinged supports) at both ends and is loades with a 50 n weight 4 m from one end and a 100 n weight 8 meters from the same end. what are the forces at the two supports
Two identical clocks are set to 12 noon time when on the ground at rest relative to the ground. What will the moving clock read if the first clock reads 6 p.m.
One of the most powerful cranes in the world operates in Switzerland. If it takes 1.00 min to lift the load at constant velocity to this height, find the power developed by the crane
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. The plate is 10.00 cm thick (vertical dimension), Calculate the apparent thickness of the plate
how does friction applied to the hot wheels track, Why would 20 degrees have a higher range (delta x) than 15-20 degrees
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