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After a plant or animal dies, its 14C content decreaseswith a half-life of 5730 years. If an archaeologist finds anancient firepit containing partially consumed firewood, and the14C content of the wood is only 17.5% that of anequal carbon sample from a present-day tree, what is the age of the ancient site?
oppositely charged parallel plates are separated by 3.65 mm. a potential difference of 600 v exists between the plates.
A 84.0kg skydiver can be modeled as a rectangular "box" with dimensions 24.0cm x 47.0cm x 178cm, What is his terminal speed if he falls feet first
Find the conversion factor between weights measured in Newtons to weights measured in pounds
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. determine the recoil velocity
An astronaut wants to remove a bolt from a satellite in orbit. He positions himself so that he is at rest with respect to the satellite, What is wrong with his method
A bowling ball (mass = 7.2 kg, radius = 0.15 m) and a billiard ball (mass = 0.33 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
A rock is thrown downward into a well that is 8.50 deep a)If the splash is heard 1.20 seconds later, what was the initial speed of the rock
1. explain what is the instantaneous values of ac and phase shift angle are. explain what the effective and average
Two electrons in an atom are separated by 1.5 × 10^?10 m, the typical size of an atom, What is the force between them
A spring is hung from the ceiling. A 0.400kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
A double-slit experiment is set up using a helium- neon laser (lamda=633nm). How thick is the glass
Two cars collide at an intersection. Car A, with a mass of 2000 kg , is going from west to east, while car B, of mass 1400 kg , is going from north to south at 17.0m/s. As a result of this collision, the two cars become enmeshed and move as one af..
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