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A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is6.5 cm at the moment the quake stops, and8.6 s later it is 2.1 cm.
1. What is the time constant for the damping of the oscillation?
2. What was the amplitude of the oscillation 4.3 s after the quake stopped?
A step-down transformer (turns ratio = 1:8) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train. What is the current in the primary coil
Two rectangular pieces of plane glass are laid one upon the other on a table. A thin strip of paper is placed between them at one edge, Find the angle of the wedge
A person walks into a room and switches on the ceiling fan. The fan accelerates with constant angular acceleration for 15 s until it reaches its operating angular speed of 1.0 rotations/s after that its speed remains constant as long as the switch..
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 21.0 days on average to complete one nearly circular revolution around the unnamed planet.
Unpolarized light passes during two polarizers in turn with polarization axes at 58° to each other. What is the fraction of the incident light intensity that is transmitted?
A hot iron horseshoe (mass = 0.470 kg), just forged, is dropped into 1.44 L of water in a 0.340 kg iron pot initially at 19.1°C. calculate the initial temperature of the hot horseshoe
If the bullet leaves the gun at a speed of 177 m/s, and misses by 1.02 m, at illustrate what angle should the gun be aimed so as to hit the target?
An object of unknown mass is attached to an ideal spring with force constant 150N/m and is found to vibrate with a frequency of 6.00Hz. Find the mass of this object
A 6.0 cm diameter pipe gradually narrowsto 4.0 cm. When water flows through this pipe at a certain rate, What is the volume rate of flow
Light with a wavelength of 525 nm passes through a single slit that is 35 micro meters wide. On a screen that is 1.5 m away, how far is the second dark spot from the central bright spot
What is the strength of the electric field.
Make a 10 to12 slide powerpoint presentation on behaviourism and social-learning theory. Include speaker notes and graphics, limit text to fie lines, and use approximately five words per bulleted item.
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