Describe the phenomenon known as diffraction
What will be an ideal response?
Waves spread as they travel. When they encounter an obstacle, they bend around it somewhat and pass into the region behind it. The amount of diffraction depends on the wavelength of the wave and on the size of the obstacle.
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A puck moves on a horizontal air table. It is attached to a string that passes through a hole in the center of the table
As the puck rotates about the hole, the string is pulled downward very slowly and shortens the radius of rotation, so the puck gradually spirals in towards the center. What happens to the puck's angular speed?
An explosion occurs 34 km away. For sound that travels at 340 m/s, you'll hear the explosion in
A) 0.1 s. B) 1 s. C) 10 s. D) 20 s. E) more than 20 s.
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity
A) It is moving in a straight line. B) It is moving in a circle. C) It is moving in a parabola. D) It is moving in a hyperbola. E) None of the above is definitely true all of the time.
In a parallel RLC circuit, where IR = IR, max sin(?t), the current through the inductor, IL, is
A. IL = ?IL, max sin(?t). B. IL = IL, max sin(?t). C. IL = ?IL, max cos(?t). D. IL = IL, max cos(?t). E. IL = IL, max tan(?t).