What is the amount left after 800 years

Assignment Help Physics
Reference no: EM13954400

Radioactice substances decay exponentially. The amount of radium present at an time t obeys the law Q(t)= Qoe^-kt, where Qo. is the initial amount present and k is a suitable positive constant. The half-life of a radioactive substance is the time required for a given amount to be reduced by one-half. Now, it is known that the half-life of radium is approximately 1600 years. Suppose initially there are 200 miligrams of pure radium. Find the amount left after t years. What is the amount left after 800 years?

Reference no: EM13954400

Questions Cloud

How many c-14 atoms did it contain in 2004 a.d. : A very old specimen of wood contains 10^12 atoms of carbon: How many C-14 atoms did it contain in the year of 9474 B.C.?
The federal, state, or local health care systems : Policies are constantly being reviewed and considered to help improve the federal, state, or local health care systems. Each one has the potential to affect each of us on a daily basis, so careful consideration must be given when policies are prop..
Do you believe in young marriage below 18 years old : Do you believe in young marriage below 18 years old?
Benefits of implementing supply chain management : Develop a compelling presentation to the operations manager that will explore the benefits of implementing supply chain management on his floor.
What is the amount left after 800 years : Radioactice substances decay exponentially. The amount of radium present at an time t obeys the law Q(t)= Qoe^-kt, where Qo. is the initial amount present and k is a suitable positive constant. What is the amount left after 800 years?
Sets delimitations and establishes the boundaries of study : sets the delimitations and establishes the boundaries of the study. states what the study will not cover or will not do. identifies the weaknesses and constraints which may affect the results of the study.
Describe the relationship between strength and time in words : A hospital physicist measure the strength of a cobalt - 60 X-Ray machine every year. His result over a six year period are shown in the table. Strength is measured in MBq (megabecquerels) or millions of counts per second. Describe the relationship..
Simple and compound interest : You invest $1,000 for five years at 5% simple interest at Bank 1. You invest $1,000 for five years at Bank 2 where interest at 5% is compounded annually. Compute the amounts that will be accumulated.
Calculate the speed of light in the core : A circular conducting loop carries a current of 5.0 A and has radius 30 mm, Calculate the magnetic field at the centre of the loop (H) How many turns would be needed to give a field of 1.0 mT

Reviews

Write a Review

 

Physics Questions & Answers

  Find the max height of the rock during flight

a catapult launches a rock towards a hill 500m away. the rock lands on the hill 20m above the release point of the rock. find the max height of the rock during flight

  What is the flux that passes through the circular loop

A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. What is the flux that passes through the circular loop

  Obtain the new angular velocity of the merry-go-round

A 25kg child stands on the rim of a 200 kg merry-go-round that has a radius of 3 m. what is the new angular velocity of the merry-go-round

  What is the current in the wire

A 0.45 V potential difference is maintained across a 1.3m length of tungsten wire that has a cross-sectional area of 0.67 mm2 and the resistivity of the tungsten is 5.6 ×10−8 · m. What is the current in the wire?

  Estimate how many turns of wire are needed

A generator is designed to produce a maximum emf of140 V while rotating with an angularspeed of 3600 rpm. how many turns of wire are needed

  What s the entropy change of water the is now steam

In a pan on a stove 125 g of water at 100 degrees Celsius is converted to steam. What s the entropy change of water the is now steam

  Find at what temperature are their resistances equal

A copper wire has a resistance of 0.500 ? at 20.0ºC , and an iron wire has a resistance of 0.525 ? at the same temperature

  Determine how fast will the disk be turning

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. determine how fast will the disk be turning

  The desired capacitance is 0300 microf and the capacitor

a parallel-plate capacitor is constructed using a dielectric material whose dielectric constant is 3.90 and whose

  Find the resistance of this graphite wire

The graphite in a pencil has a resistivity of7.84×10−6 W×m.The graphite's diameter is 0.700 mm and its length is40.0 mm. (a) Find the resistance of this graphite "wire." (b)Find the diameter of a cylindrical copper wire of the same length(having resi..

  Find the magnitude of gravitational acceleration on planet

After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 51.0cm. find the magnitude of the gravitational acceleration on this planet

  List launch vehicles that might be used to launch spacecraft

Go back and check your needs, goals and objectives to see if there are any obvious on the launch vehicle choice.  List several launch vehicles that might be used to launch your spacecraft into your chosen orbit.

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