radioactive substance, Physics

Assignment Help:

A certain radioactive substance has a half-life of 40 minutes. How much of an original 100 grams substance will remain after 2 hours?

solution) m= m0/2t/T

m=100 gms..

t=2 hours=2*60=120 min..

T=40 min

m=100/2120/40

m=100/23

m=100/8

m=12.5 gms.


Related Discussions:- radioactive substance

Determine the work produced by the steam turbine, A steam turbine takes in ...

A steam turbine takes in saturated steam at 300 C and outputs steam at 4 bar. If the efficiency of the turbine is 65%, calculate: a. The final composition (vapor vs. Liquid) of

Interaction diagram-connect force in action or reaction pair, 1. Two trucks...

1. Two trucks are connected by a rope. The rope is attached to a winch on one of the trucks so that the trucks are being pulled together slowly as the winch pulls in the rope. For

Explain uniform acceleration, UNIFORM ACCELERATION: If velocity of a bo...

UNIFORM ACCELERATION: If velocity of a body alters by equal amounts in equivalent intervals of time, then the body is said to have uniform acceleration. OR If average a

#titleprojection of body from inclined plane.., Awhat is angle of projectio...

Awhat is angle of projection of body thrown from inclined plane of 37degree so that body hits inclined plane normalysk question #Minimum 100 words accepted#

Describe the properties of x-rays, (i)  X-rays are electromagnetic waves wi...

(i)  X-rays are electromagnetic waves with wavelength lie among 0.1Å - 100Å. (ii)  X-rays is invisible. (iii) They always go in a straight line with speed of light. (iv) X

Surface tension, why does rain water boils faster than fresh water

why does rain water boils faster than fresh water

Special resistor materials: tungsten, Tungsten: Atomic numb...

Tungsten: Atomic number 74 Symbol W Atomic weight 183.85 Discovery Purified Tungste

Notify electric flux through the walls of the can is zero, Consider charge ...

Consider charge of consistent surface density (charge-per-area) everywhere on an infinite horizontal plane. In computing the electric field due to such a charge distribution one ca

What is the principle of millikans oil drop method, Q. What is the principl...

Q. What is the principle of Millikan's oil drop method? Principle This method is foundation on the study of the motion of uncharged oil drop under free fall due to grav

Principle rays to contribute to the image, A person is tasked with creating...

A person is tasked with creating a ray diagram to resolve the characteristics of the image of an object formed by a concave lens. The person has accurately drawn the principal axis

3/11/2013 3:37:25 AM

half life = 40minutes =2/3 hours

t(1/2)=(ln2 /k)

then k=(ln2/t(1/2)) = ln2/(2/3) = 3/2*(ln2)

origianl substance y0= 1000 grams

y=y0e-kt

y= 1000*(e-(3/2(ln2))*2 ) = 1000/8 = 125 grams

Write Your Message!

Captcha
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