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A crying baby emits sound with an intensity of 8 × 10-8 W/m2. What is the intensity level for a set of twins? The lowest detectable intensity is 10-12 W/m2.
If two adjacent natural frequencies of an organ pipe are determined to be 550Hz and 650Hz, calculate the fundamental frequency and length of the pipe. Assume v(air)=340 m/s
A 2kg mass is loaded into a spring cannon. The cannon's spring has a constant k = 4000 abd the spring is compressed 0.8m. How far does it move before it comes to a stop
A motorcycle has a constant speed of 23.0 m/s as it passes over the top of a hill whose radius of curvature is 149 m. Find the magnitude of the normal force that acts on the cycle
In a hydraulic system, the larger piston to be used to lift a 1670kg car has a diameter of 24.2cm, If instead compressed air at 115 psi of pressure is used, what is the largest mass car (in kg) that the system can lift
An ?-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.38 106 V, What is the speed of the ?-particle
A sound wave with intensity 10 mW/m2 interferes destructively with a sound wave that has an intensity of 1 mW/m2. What is the intensity of the superposition of the two
A physics book slides off a horizontal tabletop with a speed of 2.70{\rm m}/{\rm s} . It strikes the floor in 0.350{\rm s} . Ignore air resistance. Find the height of the tabletop above the floor
question 1consider a long straight conducting wire that terminates in a metal sphere of radius r 050 plusmn 001 cm.
Two charged objects experience a mutual repulsive force of 0.86N. If the charge of one of the objects is reduced by half and the distance separating the objects istripled, what is the new force? (Enter the magnitude of the force.)
A 33.6 kg beam is attached to a wall with a hinge and its far end is supported by a cable. What is the horizontal component of the force exerted by the hinge on the beam
A neutral pie-meson is particle that can be created by accelerator beams. If one such particle lives 1.40 x 10^16 s as measured in the laboratory, what is its velocity relative to the laboratory
A hydrogen atom initially in the n=3 level emits a proton and ends up in the ground state. what must the energy of this photon be and What is the energy of the emitted photon
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