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You are on an archaeological dig and discover a strange artifact. It is a utensil that appears to be carved out of an elephant's tusk. You analyze it and discover that it has 0.625 the amount of carbon-14 you would find in a living specimen. 1. How many half-lives has the specimen been through? (The half-life of carbon-14 is 5,730 years.) 2. How old is the specimen? 3. How much of the present amount of carbon-14 will still be in the artifact in another 11,460 years?
The distance between two telephone poles is 50.0m. When a 1.00kg bird lands on the telephone wire midway between the poles, the wire sags 0.200m. a) FBD b) How much tension does the bird produce in the wire? Ignore weight of wire
A spark plug in an automobile engine consists of two metalconductors that are separated by a distance of 0.70 mm. When an electric spark jumps between them,the magnitude of the electric field is 4.20*107 V/m.
A 50 g horizontal copper rod has a length of 1.0 m. Calculate the minimum current in the rod so that it will float in a horizontal magnetic field of 2.0 T
a rocket is moving through empty space in a straight line with constant speed. it is far from gravitational effect of
What is the maximum emf induced in a 329 turn coil square coil with sides of length 0.52 meters rotating at 262 rpm in a magnetic field of 0.374 Tesla
The capacitor in an RC circuit (R = 120 ohms, C = 45 muF) is initially uncharged. Find the current in the circuit one time constant
An astronaut on a distant planet notices that it takes 8 seconds for an object to drop 32 meters beginning from a resting position. Determine the magnitude of the acceleration due to gravity on the planet.
A hiker walks 3.50 km at an angle of 45.0 degrees north of west. After that the hiker walks 1.5 km south. What is the magnitude and direction of hiker's totally displacement.
a stationary particle of charge q 2.6 times 10-8 c is placed in a laser beam an electromagnetic wave whose intensity
a water pipe having a 2.4 cm inside diameter carries water into the basement of a house at a speed of 0.93 ms and a
Starting from rest, a 12 cm diameter compact disk takes 2.4 s to reach its operating angular velocity of 2030 rpm. How much torque is applied to the disk
After your sports car breakdown, you start to push it to the nearest repair shop. While the car is starting to move, how does the force you exert on the car compare to the force the car exerts on you? How do these forces compare when you are pushing ..
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