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The half life for the alpha decay of uranium 238 is 4.47x10^9 yrs old. Determine the age (in years) of the rock specimen that contains 60% of its original number of Uranium 238 atoms.
A system of 1454 particles, each of which is either an electron or a proton, has a net charge of -7.456×10-17 C. How many protons are in this system
Two radio-frequency point sources separated by 2.0 m are radiating in phase with ? = 1.00 m. find how many maxima it detects
A block of weight 3.9N is launched up a 30 degrees inclined plane 2.10m long by a spring with k = 2.15kN/m and maximum compression 0.10m, find How much kinetic energy does it have there
a box with a side of length L=3.00cm is positioned with one of its corners at the origin of a rectangular coordinante system. What is the electric flux through the bottom of the box
To determine the radius of gyration of a tire, an engineer lets the tire roll down an inclined surface. what is the radius of gyration of the tire
q1. a meterstick is at rest in an inertial frame s2. if s2 moves with a speed of 0.7c with respect to a rest frame s1
A wire is formed into a circle having a diameter of 10.3 cm and is placed in a uniform magnetic field of 3.25 mT. The wire carries a current of 5.00 A. Find the maximum torque on the wire.
Calculate the work done by 0.935 mol of an ideal gas when it expands isothermally from 225 bars to 1.71 bars at (a) 300 K and (b) 1000 K.
q1. a box of mass 32 kg is at rest on a horizontal frictionless surface. a constant horizontal force then acts on the
Two speakers emit sound waves with frequency of 418 Hz. They are driven by the same oscillator so that they are in phase with each other. How far apart are the antinodes in that standing wave
A spring with constant k = 10 N/m is attached to a block. What is the force on the block by the spring when the spring has been stretched by 0.05 m
A certain laboratory experiment requires an aluminum wire of length of 22.0 m and a resistance of 2.40 ? at 20.0°C. What diameter wire must be used
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