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A guitar string is 0.7m long and is tuned to play an E above middle C (330Hz).
A) How far from the end of this string must a finger be placed to play A above middle C (440Hz)
B) What is the wavelength in the air if the speed of sound is 340 m/s?
An ambulance is generating a siren sound at a frequency of 2,000 Hz. The velocity of sound is 345.0 m/s. what is the frequency of the siren perceived by the observer
In a 290-turn automobile alternator, the magnetic flux in each turn is %u03A6B = 2.50 10-4 cos %u03C9t, Determine the maximum emf in the alternator
A person's lens prescription for glasses is +3 D. If the glasses sit 1.9 cm from the eye, what is that person's near point
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
A small object with a mass of 380 mg carries a charge of 35.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the thread makes an angle of 12.0° with the vertical, ..
A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.00 atm at 20.0oC. What is the mass of this piston
An electromagnetic wave of wavelength 450 nm is traveling in vacuum in the -z direction. What is the magnetic-field amplitude of this wave
A charge of 190 µC is at the center of a cube of edge 75.0 cm. No other charges are nearby. Find the total flux through each face of the cube
A block of wood with volume V floats in water with 0.65V submerged. In oil the block floats with 0.84V of its volume submerged
When point charges q1 = +1.7 ?C and q2 = +8.7 ?C are brought near each other, each experiences a repulsive force of magnitude 0.30 N
A gun fires a bullet with muzzle velocity 0.6c. If an alien is on a spaceship which moves at 0.8c and fires the gun in the forward direction, what is the bullet's velocity according to you
What is the sound level of a sound whose intensity is 6.5 × 10-8 W/m2, What is the intensity of a sound whose sound level is 30 dB
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