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A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.73 kilogram sample of carbon from the wood has an activity of 2330 decays per minute. Determine the age of the charcoal. Living material has an activity of15 decays/minute per gram of carbon present and the half-life of 14C is 5730 y.
A long, straight wire of length 1.3 m carries current I = 3.1 A. what is the magnitude of the force on the wire
A guitar string is vibrating in its fundamental mode, with nodes at each end. The length of the segment of the string that is free to vibrate is 0.388m. What is the wave speed for the transverse traveling waves on this string
A soccer ball with mass 0.285kg is initially at rest and is kicked at an angle of 22.8 (degrees) with respect to the horizontal. What is the impulse received by the soccer ball during the kick
Three objects are connected on the table as shown in Figure P5.44. The table is rough and has a coefficient of kinetic frictionof 0.350. find the acceleration of each object and their directions
The angular momentum of a spinning wheel is 230 kg · m2/s. After application of a constant braking torque for 2.2 s, What is the torque applied
At which angle will the photon scatter with respect to its original direction? (The accepted unit abbreviations for angles are either 'deg' for degrees or 'rad' for radians.)
a 255 g mass attached to a horizontal spring oscillates at a frequency of 3.70 hz . at t0 s the mass is at x 4.80 cm
An 8.4kg crate is pulled 4.7m up a 30? incline by a rope angled 16? above the incline. What is the increase in thermal energy of the crate and incline
A vertical electric field of magnitude 1.00 x 104 N/Cexists above the Earth's surface on a day when a thunderstorm isbrewing. Determine the electric flux through thebottom of the car
Suppose that the wavelength measurement gives lambda = 6000Å with an accuracy of delta lambda/lambda=10^-6. Determine the de Broglie wavelength of a photon with a KE of 50 keV
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 56.11 diopters, and the lens-to-retina distance is 1.791 cm. (a) How far is the blackboard from her eyes? (b) If the writing on the blackboard i..
at a given instant of time the temperature distribution within an infinite homogeneous body is given by the function tx
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