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in a Tom's double-slit experiment using 549nm light, a thin piece of plexiglass of refractive index 1.53 covers one of the slits. if the center point on the screen is a dark spot instead of a bright spot, what is the minimum thickness of the plexiglass?
A tuning fork of unknown frequency is noted to be higher than one marked 512 hz and lower than one marked 1000 hz. You discover resonance points at .11 m and .53 m. Using 347 m/s for speed of sound what is the frequency of the new fork.
A standing wave is set up by reflecting radio waves from a large, flat metal dish. What is the frequency of the radio waves
A machine has an 650 g steel shuttle that is pulled along a square steel rail by an elastic cord (see figure below). The shuttle is released when the elastic cord has 16 N tension at a 45° angle
Speedboat A negotiates a curve whose radius is 150 m. Speedboat B negotiates a curve whose radius is 190 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
A 240g ball and a 130g ball are connected by a 32 cm-long massless, rigid rod. The structure rotates about its center of mass at 150rpm.
The mass of a roller-coaster car, including its passengers, is 495kg. Its speed at the bottom of the track in the figure below is 17.00 m/s. The radius of this section of track is r1 = 26 m. Find the force that a seat in the roller-coaster car exerts..
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
An object with total mass mtotal = 14 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.6 kg, What is the magnitude of the velocity of the center of mass of the pieces after the collision
At a certain time a model car's speed was 24 m/s in the positive x direction, What was the average acceleration of the car during this 8.0 s interval
An observer in frame S standing at the origin observes two flashes of colored light separated spatially by ?x = 2980 m, Find the magnitude and direction of v.
A 96 kg person stands on a scale in an elevator. What is the apparent weight when the elevator is accelerating upward with an acceleration of 1.80 m/s^2.
To find out if the ball clears the crossbar, what is its height with respect to the crossbar when it reaches the plane of the crossbar?
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