What percent of the original level of is left

Assignment Help Physics
Reference no: EM13522053

One of the problems of in-air testing of nuclear weapons (or, even worse, the use of such weapons!) is the danger of radioactive fallout. One of the most problematic nuclides in such fallout is strontium -90 (90^Sr), which breaks down by B- decay with a half-life of 28 years. It is chemically similar to calcium and therefore can be incorporated into bones and teeth, where, due to its rather long half-life, it remains for years as an internal source of radiation.

Part A What percent of the original level of is left after 56 years?

Part B How long would you have to wait for the original level to be reduced to 0.781% of its original value?

t=_____________ years

Reference no: EM13522053

Questions Cloud

Define what is the initial cell potential : A voltaic cell consists of a Zn/Zn^2 + half-cell and a Ni/Ni^2 +half-cell at 25C. The initial concentrations of Ni^2 + and Zn^2 + are 1.70 M and 0.100 M, respectively. What is the initial cell potential
Find the voltage across the resistor and the inductor : A series LR circuit with L = 20 mH and R = 2.0 k? is connected to a potential source of amplitude 5.0 V and angular frequency 200 rad/s. find the voltage across the resistor and the inductor
Anaerobic metabolism of glucose : what is the net energy yield  for the anaerobic metabolism of glucose?
Which container has more gas molecules : Which container has more gas molecules?
What percent of the original level of is left : One of the problems of in-air testing of nuclear weapons (or, even worse, the use of such weapons!) is the danger of radioactive fallout. What percent of the original level of is left after 56 years
Experiments or careful observations of natural world : Can you determine which  sentences are the premise's and what sentence is the conclusion ? Scientific beliefs differ from some religiouse beliefs in that it is part of the scientific method to test scientificific beliefs by repeatable experiments ..
Explain what is compound 9 and what is compound 8 : Compound 8 has the formula C4H6Cl2O and is reacted with CH3OH to give compound 9. Compound 9 has the 1H NMR signals 2.1(quintet, .8), 2.5(triplet,.8), 3.6(triplet, .8), 3.7(singlet, 1.2). What is compound 9. What is compound 8. Draw structures and..
Find how many of them will be left : Half-life of C^14 is 5730 yr. Find its decay constant. If we have 4.8X10^14 atoms of C^14, after 10000yr. How many of them will be left
Evaluate the value of ph for the reaction : When 1.50 mol of of CH4 reacts with excess Cl2 at a constant pressure according o the chemical equation, CH4 + 3CL2 2 CHCl3 + 3H2, and 1062 kL of heat are released. Calculate the value of ?H? for this reaction. ?H=?

Reviews

Write a Review

 

Physics Questions & Answers

  What is the net force acting on the car

A car changes it speed from rest to 12 km/hr in 4sec .If the mass of the car is 2000 killograms what is the net force acting on the car

  Determine magnitude and direction of the electric field e

Four protons, each with charge +e, are fixed at the corners of a square of side length a, Determine magnitude and direction of the electric field E

  What is the voltage amplitude of the source

A series circuit consists of a 50.0-Hz ac source, a 50.0-ohm resistor, a 0.500-H inductor, and a 60.0-µF capacitor. What is the voltage amplitude of the source

  Calculate the pressure exerted on the skin

Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 4.40 N

  What is the voltage across the output circuit

A transformer has an input coil with Nin = 200 turns and Nout = 850 turns. what is the voltage across the output circuit

  Illustrate what is an area of gry squared in points squared

A common measure for length in the publishing business is a point, defined as 1/72 inch. Illustrate what is an area of 0.50 gry squared in points squared? Round answer to the nearest hundreth.

  At what distance the electric field magnitude equal to e

A very long, straight wire has charge per unit length (lambda) . At what distance from the wire is the electric field magnitude equal to E ? How do you solve this problem?

  What is the mass of the block

A cube with edge 3.0 cm floats with 2/3 of its volume below the surface of the water. What is the mass of the block

  How fast is the shadow of the plane moving along the ground

During takeoff, an airplane climbs with a speed of 160 m/s at an angle of 24 degrees above the horizontal. How fast is the shadow of the plane moving along the ground

  Determine the water pressure in such a pipe on the top floor

Water at a pressure of 3.4 atm at street level flows into an office building at a speed of 0.5 m/s through a pipe 7.00cm in diameter. The pipes taper down to 2.6 cm in diameter by the top floor, 28m above.

  What speed would the train be going

The barricade at the end of subway line has a large spring designed to compress 2.00 m when stopping a 1.00 x 10^5 kg train moving at 0,500 m/s. What speed would the train be going if it only compressed the spring 0.500 m?

  Find the frequency heard by the engineer on train

Two trains on separate tracks move toward one another. Train 1 has a speed of 130km/hr and train 2 has a speed of 90km/hr. What is the frequency heard by the engineer on train

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd