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For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. The period of this sound is 73.1 ms. Determine the wavelength of the sound, if temperature the seawater is 20°C.
On a spacecraft two engines fire for a time of 589 s. One gives the craft an acceleration in the x direction of ax = 5.05 m/s2, Calculate the magnitude of the initial velocity
A transformer with 340 turns in its primary coil and 30 turns in its secondary coil is designed to deliver an average power of 1390 W with a maximum voltage of 67 V
A small drop of oil is suspended motionless in the air by a uniform electric field that is directed upward and has a magnitude of N/C, What is the mass of the drop
Four identical charges (+1.9 ?C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A solid spherical ball of mass 2.3 kg and radius 0.11 m rolls along a smooth, What is the ball's rotational kinetic energy
A car chases a coyote down a road ending in a sheer cliff. The car has a speed of 40 m/s and the coyote has a speed of 30 m/s. What beat frequencies do each the coyote and the driver hear
q1. the sound level measured in a room by a person watching a movie in a home theatre system varies from 66 db during a
The outside mirror on the passenger side of a car is convex and has a focal length of -5.7 m. compute the magnification of the mirror
A small rock with mass 0.12 is fastened to a massless string with length 0.80 to form a pendulum, find the tension in the string as it passes through the vertical
Two tiny spheres of mass 6.80 mg carry charges of equal magnitude, 72.0 nC, but opposite sign. Which ball (the one on the right or the one on the left ) has positive charge ? What is the magnitude E of the field
The angular speed of the rotor in a centrifuge increases from 423 to 1404 rad/s in a time of 5.20 s. Obtain the angle through which the rotor turns
What is the tension in (a) the nearer (relative to the person) cable and (b) the farther (relative to the person) cable.
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