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
Oxana [17]
3 years ago
13

A sample of radium-226 will decay to ¼ of its original amount after 3200 years. What is the half-life of radium-226?

Physics
1 answer:
lesantik [10]3 years ago
3 0
<h3><u>Answer</u>;</h3>

1600 years

<h3><u>Explanation</u>;</h3>
  • Half life is the time taken for a radioactive isotope to decay by half of its original amount.
  • We can use the formula; N = O × (1/2)^n ; where N is the new mass, O is the original amount and n is the number of half lives.
  • A sample of radium-226 takes 3200 years to decay to 1/4 of its original amount.

Therefore;

<em>1/4 = 1 × (1/2)^n</em>

<em>1/4 = (1/2)^n </em>

<em>n = 2 </em>

Thus; <em>3200 years is equivalent to 2 half lives.</em>

<em>Hence, the half life of radium-226 is 1600 years</em>

You might be interested in
1.which of the following are true.
Ksivusya [100]

B is the correct answer

3 0
3 years ago
Read 2 more answers
If you double the distance between you and the center of Earth, what happens to the strength of the gravitational field you expe
Lostsunrise [7]

Answer:

The strength of gravity decreases.

An example of that would be if you were in space; you float around because there's no gravity.

7 0
3 years ago
An object moves 2.5 m. This is an example of a _______. Question 3 options: direction distance velocity speed
Hitman42 [59]
Distance, since distance represents how far something has travelled, which would be in our case 2.5m.
5 0
3 years ago
Read 2 more answers
A car travels 82 meters do North and 14 seconds the car turns around and travels 44 m due south in four seconds what is the magn
Yakvenalex [24]

Answer:

2.11 m/s

Explanation:

Take north to be positive and south to be negative.

Average velocity = displacement / time

v = (82 m + -44 m) / (14 s + 4 s)

v = 2.11 m/s

The velocity is positive, so it is 2.11 m/s north.  The magnitude of the velocity is 2.11 m/s.

8 0
3 years ago
In order to waken a sleeping child, the volume on an alarm clock is doubled. Under this new scenario, how much more energy will
Kamila [148]

Answer:4 times more energy will be striking the childbearing

Explanation:

Because Volume is directly proportional to amplitude of sound. Energy is proportional to amplitude squared. If you triple the amplitude, you multiply the energy by 4

5 0
2 years ago
Other questions:
  • What type of circuit is illustrated?
    13·1 answer
  • Why do objects that are thrown or shot follow a curved path
    15·1 answer
  • Why does the band of stability curve upward at high atomic numbers? excess neutrons are required due to the repulsion between th
    14·1 answer
  • You sit "at rest" in front of your computer to answer this question. But you sit on the surface of a planet that spins, so even
    5·1 answer
  • What is the energy per photon absorbed during the transition from n = 2 to n = 3 in the hydrogen atom?
    15·1 answer
  • Which of the following is not like the others?
    11·1 answer
  • The highest energy waves in the electromagnetic spectrum are
    5·1 answer
  • Find the magnitude of the sum of two vectors; A is 5 km , and B is 7 , when the angle btween them is 120
    9·1 answer
  • A group of students conduct an experiment with a block of wood sliding down an incline. They find that the final energy of the b
    5·1 answer
  • A man wishes to travel due north in order to cross a river 5 kilometers wide flowing due East at 3 kilometers per hour . if he c
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!