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Sonar is used to determine the speed of an object. A 40-kHz signalis sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fast is the object moving?
a. kc 8.98755 x 102 nm2c2 and the charge on a proton is 1.60218 x 10-19 c. find the potential 1.08 cm from a proton.b.
An electron moves through a uniform electric field = (2.30 + 4.90) V/m and a uniform magnetic field = 0.400 T. Determine the acceleration of the electron when it has a velocity = 12.0 m/s. ax = m/s2 ay = m/s2 az = m/s2
This problem deals with a multi-loop circuit and I was wondering how you determine the direction of the inner loops which are needed to determine if an amp or volt is added(opposite the inner loop) or subtracted(same direction as the inner loop).
An elevator and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 11 m/s
Suppose that the separation between two speakers A and B is 4.40 m and the speakers are vibrating in-phase, What is the largest possible distance between speaker B and the observer,
A convex lens of 10 cm focal length is placed in contact with a convex lens of 15 cm focal length. What is the focal length of the combination
if the coefficient of static friction between tires and pavement is 0.55 calculate the minimum torque that must be
At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire?
Four identical particles, each with mass m = 10-6 kg and charge Q = 10-6 C, are initially at the four corners of a square with side-length a = 0.01 m. what is the final speed of the released particle once it is very far away
A 20.0-kg uniform plank is supported by the floor at one end and by a vertical rope at the other, find the magnitude of the force that the floor exerts on the plank
An emf of 21.0 mV is induced in a499 turn coil when the current is changingat a rate of 14.0 A/s. What is the magnetic flux through each turn of the coil at an instant when the current is 7.00 A?
Describe two different energy alternatives to fossil fuels in detail. Discuss how they work, how they compare with fossil fuels, and their relative advantages and disadvantages.
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