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You are dating Moon rocks based on their proportions of uranium-238 (half-life of about 4.5 billion years) and its ultimate decay product, lead.
Part A: Find the age for a rock for which you determine that 50% of the original uranium-238 remains, while the other 50% has decayed into lead. Express your answer using three significant figures.
Part B: Find the age for a rock for which you determine that 64% of the original uranium-238 remains, while the other 36% has decayed into lead. Express your answer using three significant figures.
A Single Turn, Square Loop A 0.408 m length of wire is formed into a single-turn, square loop in which there is a current of 14.3 A. What is the maximum torque that the loop can experience
A long solenoid consists of 1600 turns and has a length of 0.55 m.The current in the wire is 0.41 A. What is the magnitude of the magnetic field inside the solenoid?
A car is traveling along a straight road at a velocity of +35.2 m/s when its engine cuts out. Find the velocity of the car at the end of the initial 1.71-second interval
Blood with density 1.06 g/cm^3 and 10-kPa gauge pressure flows through an artery at 27cm/s. What fraction of the artery's area is obstructed
A block of mass m slides without friction along the looped track shown in the figure. If the block is to remain on the track, even at the top of the circle (whose radius is r), from what minimum height h should it be released?
Find the initial acceleration of the bullet when it enters the wood and the time needed for the bullet to penetrate 4.5 in into the wood.
a worker at b pulls on the rope attached to the top of the pole at a with a force of f20n. a determine the moment
A 120-V motor has mechanical power output of 3.60 hp. It is 87.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
Three resistors are connected in series across a battery, What is the greatest voltage that the battery can have without one of the resistors burning up, How much power does the battery deliver to the circuit
A train engine weighs 5 times as much as aflatbed car. If the engine coasts at 3 km/hr into the boxcarthat is initially at rest and becomes coupled to the boxcar, how fast do the two move after the inelastic collision?
A 17g particle is moving to the left at 24m/s. How much net work must be done on the particle to cause it to move to the right at 40 m/s.
You stand at the center of a carousel spinning at rate w. You throw a ball horizontally with velocity Vo from a heigh h. what is the centrifugal force on the ball? what is the coriolis force on the ball?
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