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The half life of 14C is 5730 years. What fraction of the 14C nuclei in a sample are left after 7660 years?
The amount of 14C in an old, isolated sample of vegetation is 0.757 that expected from a present day sample with an equivalent carbon content. Calculate the age of the old sample in years.
Velocity and time for the moving particle.
The drive shaft AB of an automobile is to be designed as a thin-walled tube. The engine delivers 125 kW when the shaft is turning at 1500 rev/min. Determine the minimum thickness of the shaft's wall
In a supernova, a red giant of mass 1.19*1031 kg collapses into a neutron star of mass 5.97*1030 kg
A block of wood with volume V floats in water with 0.62V submerged. In oil the block floats with 0.86V of its volume submerged. Find the density of the wood
A 1.5-H inductor is connected in series with a 200-? resistor through a 15-V dc power supply and a switch. what is the maximum energy stored in the inductor
A planet can have an atmosphere if the escape speed of the planet is 6 times larger than the thermal speed of molecules in the atmosphere. What is the radius of this object's orbit around the sun
How long does it take mass to make one complete revolution.
What is the angular velocity of the disk. If a single bit requires 5 µm of length along the motion direction, how many bits/second can the writing head write when it is 3.0 cm from the axis? display all work and explanations.
An ocean liner leaves New York City and travels 37.0° north of east for 171 km. How far east and how far north has it disappeared? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
A turtle crawls along a straight line, which we will call the x-axis with the positive direction to the right. The equation for the turtle's position as a function of time is x(t) = 50.0 cm +(2.00 cm/s)t -(.0625 cm/s^2)t^2 At what time is the turt..
The cockroach finds a bread crumb on the rim and, of course, stops. What is an angular speed of the lazy Susan after the cockroach stops.
Evaluate the stability of of Na in the NaCl structure
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