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The half-life of a sample of 1011 atoms that decay by alpha particle emission is 10 min. How many alpha particles are emitted in the time interval from 10 min to 100 min?
FA 2.0%u03BCC charge and a 2.9%u03BCC charge are 11.0cm apart. Find a point where the electric field is zero
A small block with mass 0.0525kg slides in a vertical circle of radius 0.0750m on the inside of a circular track. What is the magnitude of the normal force that the track exerts on the block when it is at the top of its path
A wheel with radius 1.50 m is turning about a horizontal axis through its center (the plane of the wheel is vertical). The wheel starts from rest and undergoes constant angular acceleration in the counter clockwise direction. At the lowest point of i..
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.2×106 , What is the total work they do on the supertanker
A 1.0mm-diameter, 40cm-long copper wire carries a 5.0A current. What is the potential difference between the ends of the wire
Packages in an automobile parts supply house are transported to the loading dock by pushing them along a roller track with very little friction. At the instant shown packages B and C are at rest and package A has a velocity of 6 ft/s. Knowing that..
A plane polarized EM wave propagates through a polymer. Such waves obey a similar wave equation to that found for free space. The wave has a magnetic field vector, B=[(-1.2 i) x sin(ky wt)] microT (micro telsa) , with frequency f=7.61×10^(14) Hz and ..
An AC voltage of the form ?v = 100 sin 1 000t, where ?v is in volts and t is in seconds, is applied to a series RLC circuit. Find the average power delivered to the circuit
an accelerators beam is e 100mev protons that hit target that is made of iron. find the amount of time it takes for
use the laws of classical mechanics to solve this problem. an atom of mass m moves in positive x direction with speed
A 1000- kg car collides with a 1300- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car
Ultrasound intensity level: Beta = 10Log (I2/I1), I1 and I2 = intensity at different locations/times An ultra sound signal is sent under sea water (v=1530m/s) to detect the location of an object. Determine the location of the object from the source
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