What is the half-life of the radioisotope
The activity of a radioisotope is 3000 counts per minute atone time and 2736 counts per minute 48 hours later. What is the half-life of the radioisotope?
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On New York's Verrazano Narrows bridge, traffic accidents occur as a mean rate of 1.0 crash per day. Let X be the number of crashes in a given day. What is the probability of at least one crash per week?
How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57 x 10^-21 newtons and the distance between two small spheres of equal charge is 0.2 meters?
What is the pressure needed to control the fire at the sprinkler if each sprikler is to cover 100 sq. ft. Find the following for Benzene & Gasoling Benzene Gasolilne 1) Boiling Point 2) Flash Point.
Two long wire are connected parallel to each other at closest they ae 20.0 cm apart.what is the magnitude of the magnetic field at a point midway between them if the top one carries a current of 20.0A and the bottom one carries 5.0A.
Find what the minimum height ( h ) must be for a pine board .04 m (4 cm) thick that will support the given load. b) Perform the same calculation if a 1040 steel material is used in place of the the pine wood.
Find the emf induced in the toroid when the current decreases to 0.9 A from 2.6 A in a time of 0.13 s.
What is the acceleration (a) of the logs rolling down the hill? What is the magnitude of the frictional force of the rolling logs?
A product used in a laboratory of the hospital costs $60 to order, and its carrying cost per item per week is one cent. Demand for the item is six hundred units weekly. The lead time is three weeks and the purchase price is $0.60.
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