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Question: A sample of radioactive material contains 1.3 1015 atoms and has an activity of 5.6 x 1011 Bq.
Question 1: What is its half-life?
Show all work, use additional paper if necessary.
A 650 kilogram elevator starts from rest. It moves upward for 3.5 second with constant acceleration until it reaches it cruising speed, 1.75 m/s. Evaluate the average power of the elevator motor during this period
In a circus an elderly performer thrills the crowd by catching a canon ball shot at him. what is his recoil velocity
an am station is broadcasting a radio wave whose frequency is 1500 khz. the value of the capacitance in the lc-tuned
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1. a compact disk spins with angular velocity 43.5rads . the player is turned off and 2.95s later the cd has
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Assume we have an infinitely long wire carrying a current of 4.0 A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at the point P with coordinates (0.2 m, 0.2 m)..
Consider a Resistor and inductor circuit connected to a generator, Vmax is given, frequency is given, L is given R is given. Find the phase between current I and V
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