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The half-life of some naturally occurred currying radioactive isotope is 80 years. How long would it take for a sample of this isotope to decay to one-tenth of the initial amount?
You swing an object in a vertical circle of radius 0.860m. What is the mass of the object
A 25 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 18 C in an insulated cup. What will the new water temperature be.
A 2.8 kg block is on an incline with a coefficient of static friction of 0.77. If the angle that the ramp makes by the horizontal is increased gradually, at what angle among the incline and the horizontal will the block begin to slide down the ramp?
A beam of X-rays having a wavelength of .09nm impinges on an unknown crystal. What is the spacing between the atomic plates
Which explains a process where a precipitate is formed?
You digitize a 10-kHz signal by sampling it at twice the highest frequency (i.e 20,000 times a second) and encoding the the intensity in 8-bits. What is the resulting data rate
A liter of water has a mass of 1 kg and the mass of a water molecule is 18 amu. How many molecules of water are there in 2 L of water
A jelly donut is dropped from a height of 1m above the big belly of a horizontal couch potato. How high did it rise on its first bounce
A -6.00 µC charge is moving with a speed of 7.80*104 m/s parallel to a very long, straightwire. The wire is 5.00 cm from the charge and carries a current of78.0 A in a direction opposite to thatof the moving charge. Find the magnitude and directio..
A merry-go-round is stationary. A dog is running on the ground just outside its circumference, moving with a constant angular speed of 0.705 rad/s. Determine at what time will the dog reach the bone
A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water (1 gram/cm$) and a specific heat 0.217 times that of water (1 cal/g °C). When the internal energy of the cube increases by 47000 cal its temperature increa..
Ignore the force of gravity.
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