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
Darina [25.2K]
2 years ago
13

If we start with 1.000 g of cobalt-60, 0.675 g will remain after 3.00 yr. this means that the of is _____

Physics
1 answer:
Tju [1.3M]2 years ago
8 0
<span>Cobalt-60 is undergoing a radioactivity decay.

The formula of the decay is n=N(1/2)</span>∧(T/t).
<span>Where N </span>⇒ original mass of cobalt
<span>           n </span>⇒ remaining mass of cobalt after 3 years
          T ⇒ decaying period
           t ⇒ half-life of cobalt.

So,
0.675 = 1 × 0.5∧(3/t)
log 0.675 = log 0.5∧(3/t)
3/t = log 0.675 ÷log 0.5
 3/t= 0.567

t = 3÷0.567
  = 5.290626524

the half-life of Cobalt-60 is 5.29 years. 

<span>           
</span><span>
</span>
You might be interested in
A crane lifts a 1,750 kg mass using a steel cable whose mass per unit length is 0.88 kg/m. What is the speed of transverse waves
Sauron [17]

Answer:

139.6m/s

Explanation:

Calculate the tension first, T=m*g

mass(m): 1750kg, gravity(g): 9.8m/s^2

T= 1750*9.8

 =17150N

Then calculate the wave speed using the equation v = √ (T/μ)

v= √(17150N)/(0.88kg/m)

 =139.6m/s

4 0
2 years ago
in which type of wave are vibrations at right angles to the direction in which the wave is travelling​
Pani-rosa [81]

Answer:

longitudinal waves have those properties

7 0
2 years ago
When an athlete holds a barbell overhead, the reaction force is the weight of the barbell on his hand. how does this force vary
Sonja [21]
The force applied by the competitor is littler than the heaviness of the barbell. At the point when the barbell quickens upward, the power applied by the competitor is more prominent than the heaviness of the barbell. When it decelerates upward, the power applied by the competitor is littler than the heaviness of the barbell.
3 0
3 years ago
The Brazilian rain forest is an area with significant biodiversity. As the rain forest is replaced with agricultural land, it is
valina [46]
B I think I’m not sure tho
4 0
3 years ago
Read 2 more answers
What is a description of compounds?
elena-14-01-66 [18.8K]
Compounds are elements that are chemically combined, like water for example (it’s both hydrogen and oxygen.)
8 0
2 years ago
Read 2 more answers
Other questions:
  • A chemist has two compounds that do not chemically react. He thinks that by finding the right catalyst, he can get them to react
    15·1 answer
  • How much work is done on 10.0C of charge to move it through a potential difference of 9V in 10s?
    7·1 answer
  • A boy throws a ball vertically up and catches it after 3 s. What height did the ball reach?
    9·2 answers
  • How many windows should the real tree house have
    14·1 answer
  • Water is entering the prism at a rate of A m^3/hr. The prism is empty at time 0. Express the depth d of the water in meters in t
    9·1 answer
  • I HAVE 5 MINUTES!!!!!! A block oscillating on the end of a spring moves from its position of maximum spring stretch to maximum s
    11·1 answer
  • if two objects masses 8kg and 24 kg are dropped from top of a building. Which one reaches the ground first
    10·2 answers
  • An iron nail having threads along its cylindrical surface is​
    12·1 answer
  • How is the levitation of the SCMagLev train achieved? Just write a sentence.
    6·2 answers
  • You walk 6 meters east followed by 4 meters west in 4 seconds. What is your velocity
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!