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The age of a piece of wood from an archeological site is to be determined using the Carbon-14 method. The activity of the sample is measured to be 0.655 times the Carbon-14 activity of living plants. What is the age of the sample in years? (The half-life of the Carbon-14 isotope is 5730 years.)
An object-spring system moving with simple harmonic motion has an amplitude A, What is the total energy of the system in terms of k and A only
One simple model for a person running the 100{\rm m} dash is to assume the sprinter runs with constant acceleration until reaching top speed, what will be his total time
A rocket is launched from rest with an acceleration of 30m/s^2 for the duration of one second when it runs out of fuel. What is the max height of the rocket
A stunt pilot weighing 0.70 kN performs a vertical circular dive of radius 0.80 km. What force does the plane exert on the pilot
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 54.56 diopters, How far is the blackboard from her eyes
A 2.00 kg steel gas can holds 10.0 L of gasoline when full. What is the average density of the full gas can
A steel pipe 22 m long, installed when the temperature was 15°C, is used to transport superheated steam at a temperature of 125 °C. Steel's coefficient of linear expansion is 1.2 × 10-5 K-1. The pipe is allowed to expand freely when the steam is tran..
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
The gravitational acceleration of bodies dropped near the Moon's surface is about 1.6 m/s^2. Find the time for an object dropped from rest to fall 3.0m on the Moon Find the time for an object dropped from rest to fall 3.0m on Earth.
An ocean liner leaves New York City and travels 13° north of east for 268 km. How far east and how far north has it gone? In other words, what are magnitudes of the components of the ship's displacement vector in the following directions.
Spiderman, whose mass is 72.0 kg, is dangling on the free end of a 11.4-m-long rope, How much work was done by the gravitational force on Spiderman in this maneuver
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