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Some pipe organs create sounds lower than humans can hear. This "infrasound" can still create physical sensations. Assume a sound speed of 343 m/s.
What is the fundamental frequency of the sound from an open-open pipe that is 32 feet long (a common size for large organs; 1 ft = 0.305 m)?
What length open-closed tube is necessary to produce this note?
An RLC series circuit is connected to a 120-Vrms, 60Hz line. The inductance is 0.05 H, the average current is 11A and the current leads the voltage by 45 degrees.
to take off from the ground an airplane must reach a sufficiently high speed. the velocity required for the takeoff the
a boat moves through the water with two forces acting on it. one is a 1900 n forward push by the water on the propeller
A crate of mass 9.4 kg is pulled up a rough incline with an initial speed of 1.46 m/s. The pulling force is 94 N parallel to the incline, which makes an angle of 20.2° with the horizontal. The coefficient of kinetic friction is 0.400, and the crat..
A spaceship containing an astronaut travels at a speed of 0.50 c relative to a second inertial observer. What is the total energy of the astronaut according to the astronaut if her mass is 70kg
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.695 s to reach the opposite tower, 20.0 m away. If a 1.00-m length of the ..
two small spheres spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each spere
Four charges with equal magnitudes of 11.1 x 10-14 Care placed at the corners of a rectangle. The lengths of the sides of the rectangles are 2.36 cm and 2.92 cm. Find the magnitude of the electric field at the center of the rectangle, assuming tha..
A half-wave antenna works on the principle that the optimum length of the antenna is half the wavelength of the radiation being received. What is the optimum length of a car antenna when it receives a signal frequency of 94.7 MHz?
Air is released from the tire during a short time interval, so that the temperature remains at the value found in part 1(294.2759). What quantity of air (as a fraction of Ni, the initial number of particles) must be released from the tire
A 2.0 kg object moving with a velocity of +6.0 m/s collides with a 6.0 kg object that is initially at rest. Find the energy lost in the collision.
A light beam fully illuminates a 4-slit diffraction slide, creating a central maximum of intensity 2.0 mW/sq cm. Find what is the intensity of the central maximum
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