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A longitudinal standing wave is established in a tube open at one end only. In air, the fundamental frequency is 110 Hz. What is the frequency of the 3rd harmonic when helium fills the tube? Take the speed of sound in helium to be three times as great as that in air.
3 an observer in spaceship B obverses another spaceship A travelling with a velocity of 0.40 c relative to him. Both are moving in the +x-direction, how much time it takes the missile to reach you
The charge of 20μ C produces an electric field. Twopoints are 10 cm and 5cm from this charge. Find the amount of workdone in taking a proton from one point to another
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. estimate the speed of the bullet
a series rlc circuit has a source of time-varying emf providing 15 v at a frequency f0 with l 7.90 mh r 130 omega and
a physics student swings a pail of water in a vertical circle 1.0 m in radius at a constant speed. if the water is not
) On a horizontal frictionless surface, a block of mass M is sliding along on constant velocity v. A block of mass m lands on top of the original block. What is the velocity of the new system
A warehouse workerpushes a crate along the floor by a force of 29.0 N that points downward at an angle of 50.0^\circ below the horizontal. Find the vertical component of theforce
A fully equipped astronaut has a mass of 140 kg. If the astronaut has a weight of 675 N standing on the surface of a planet, what is the acceleration due to gravity on this planet?
A particle p traveling with a speed of vpi = 3 m/s hits and scatters elastically from another particle N, initially at rest. Particle p is deflected through 90°, leaving with a speed of vpf = 2.7 m/s, and a mass mp = 2 kg. What is the speed of the..
A compact disc, initially at rest, is spun up to an angular velocity of 22 rad/s by a constant angular acceleration of 4.0 rad/s^2. How much time does the disk take to reach maximum velocity
Find the electric and magnetic field amplitudes in an electromagnetic wave that has an average energy density of 2.7 J/m3. electric field
An observer moving at a speed of 0.795 c relative to a rod (Fig. P26.14) measures its length to be 2.00 m, What is the proper length of the rod
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