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A sonic depth gauge is placed 5m above the ground. Anultrasound pulse sent downward reflects off snow depth depends onthe device using the correct air temperature is 0C.
(a) How far is the surface of the snow from the device?
(b) How deep is the snow?
(c) Does it appear that the accuracy of the measured snowdepth depends on the device using the correct airtemperature?
A vertical straight wire carrying an upward 30-A current excerts an attractive force per unit length of 8.0*10^-4 N/m on a a second paralled wire 7.0 cm away
q1. a jewel thief hides a diamond by placing it on the bottom of a public swimming pool. he places a circular raft on
A traveler first drives 19.4 km east, then 29.7 km southeast, and finally 9.9 km south. Find the traveler's total displacement
In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. what beat frequency is heard when the hammer strikes the two strings simultaneously
The mass of a regulation tennis ball is 52.0g (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 26.0m/s}. what impulse did he exert on the ball
The angular speed can be represented as ? = (rad/s)(1 rev/2p rad) = 2.53e7 rev/s. The electrons travel around a circle of radius .07m, 25 million times per second. What is the period of revolution of the electrons
A sphere rolls, without slipping, down an incline. The sphere has a mass of 0.450 kg and a radius of 6.78 cm. what is the rotational inertia of the sphere
A uniform 1.5T magnetic field passes perpendicular through the plane of a wire loop 0.3m in area. What flux passes through the loop
A cubical room 2.5 x 10^7 m^3 (NASA's vehicle assembly building) is filled with nitrogen (N2) gas @ 100 kPa and 27 degrees Celsius. What is the mass of the gas in the room
A pressure as low as P = 8 ? 10-11 Pa has been obtained. Suppose a chamber contains helium at this pressure and at room temperature, Estimate the mean free path
A uniform-density 8 kg disk of radius 0.27 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 39 N by a distance of 0.7 m. Now ..
A 1100kg car traveling south at 24 m/s with respect to the ground collides with and attaches to a 2550kg delivery truck traveling east at 16 m/s. Determine the direction of the velocity of the two vehicles
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