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(a) Find the wavelength of the sound upwind of the siren.
(b) Find the wavelength of the sound downwind of the siren.
(c) Firefighters are approaching the siren from various directions at 15.5 m/s. What frequency does a firefighter hear if he or she is approaching from an upwind position, so that he or she is moving in the direction in which the wind is blowing?
(d) What frequency does a firefighter hear if he or she is approaching from a downward position and moving against the wind?
A slab of a thermal insulator with a cross-sectional area of 110{\rm cm^2} is 2.90{\rm cm} thick. how much heat flows through the slab
A hollow conducting sphere is surrounded by a large concentric, spherical, Using Gauss's Law, find the charges and the electric fields everywhere
The electromagnetic wave that delivers a cellular phone call to acar has a magnetic field with an rms value of 1.50 10-10 T. The wave passes perpendicularlythrough an open window, the area of which is 0.20 m2.How much energy does this wave carry thro..
A mica sheet 0.969 ?m thick is suspended in air. In reflected light, there are gaps in the visible spectrum at 460, 525, Calculate the index of refraction of the mica sheet
A very long straight wire carries current 44 A. In the middle of the wire a right-angle bend is made. Determine the magnetic field at the center of the arc
If the electric potential is different from zero in some region of space, can the electric field be zero in that same region? and If the electric potential is zero in some region of space, can the electric field be different from zero in that regi..
the rst measurements of the properties of highpressure gases e.g. carbon dioxide were made by amagat in france in the
A baseball is bunted down the third-base line leaving the bat from a height of 0.800m with an initial velocity of 8.00m/s at an angle 30 degrees above the horizontal. What is the speed of the ball just before it hits the ground
The weight of the car is 14 kN. You know three points on the plane, What is the force of friction (Ff=?).
Sodium ions (Na+) move at 0.855 m/s through a bloodstream in the arm of a person standing near a large magnet. what would be the magnetic force on the arm
A cart of mass 6.8 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 6.4 kg causing them to travel with the velocity 7.63 m/s. What is the velocity of cart B.
Type your question hereConcave spherical mirror has radius of curvature =15 cm. What is the magnification of the image
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