1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bas_tet [7]
2 years ago
5

Nucleus A decays into the stable nucleus B with a half-life of 22.07 s. At t=0 s there are 1,293 A nuclei and no B nuclei. At wh

at time will there be 779 B nuclei?
Physics
1 answer:
Alexeev081 [22]2 years ago
5 0

Answer:

29.38 seconds

Explanation:

Half life, T = 22.07 s

No = 1293

Let N be the number of atoms left after time t

N = 1293 - 779 = 514

By the use of law of radioactivity

N=N_{0}e^{-\lambda t}

Where, λ is the decay constant

λ = 0.6931 / T = 0.6931 / 22.07 = 0.0314 decay per second

so,

514=1293e^{-0.0314t}

2.5155=e^{0.0314t}

take natural log on both the sides

0.9225 = 0.0314 t

t = 29.38 seconds

You might be interested in
When most chemical reactions take place, some ____ in the reactants must be broken, a process that requires energy.
BabaBlast [244]

Answer:

compound I believe number 1

6 0
2 years ago
Read 2 more answers
How is item A different from Item B?
iris [78.8K]

Explanation:

well there is nothing there and it could be different by diffrent objects, idk

8 0
2 years ago
Read 2 more answers
ASAPP!!!!!!
lord [1]
I would say the plastic grip because glass, wood, and plastic are all good conductors of electricity
5 0
3 years ago
Figure A-10 shows the back of a typical bottle of engine oil. The label indicates that this oil is SAE 10W-30, with a classifica
irina1246 [14]
The first statement make more sence
8 0
3 years ago
Name a situation when potential energy is useful
adell [148]
Gravitational energy is a form of potential energy because it is dependent on the mass of an object and needs to be calculated for the specific object.
3 0
3 years ago
Other questions:
  • Particle q₁ has a charge of 2.7 μC and a velocity of 773 m/s. If it experiences a magnetic force of 5.75 × 10⁻³ N, what is the s
    13·2 answers
  • Can you think of a scenario when the kinetic and gravitational potential energy could both be zero ? Describe or draw how this c
    15·1 answer
  • Elizabeth was a brilliant lawyer until she began hearing voices and seeing things that are not there. She also has trouble with
    5·2 answers
  • There is no gain in mechanical advantage in a single fixed pulley but they are used​
    12·1 answer
  • An object is swung in a horizontal circle on a length of string that is 0.93 m long. Its acceleration is 26.36 m/s2. What is the
    13·1 answer
  • Which of the following materials would want an electric cord insulated with so you do not get shocked?
    6·2 answers
  • Why is blood in the right atrium low in oxygen
    12·1 answer
  • HELP PLEASE <br> THANK YOU!!
    14·2 answers
  • A girl pushes her little brother on his sled with a force of 300 N for 750 m.
    14·1 answer
  • Find the momentum of a body of mass 5kg moving with velocity of 4.5m/s<br><br>​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!