The half-life of cobalt-60 is 5.3 years. after __________ years, 1/4 of the original amount of cobalt-60 will remain.

Answers

Answer 1

Answer: The number of years required for 1/4 cobalt-60 to remain after decay is calculated as follows

after one half life 1/2 of the original mass isotope remains

after another half life 1/4 mass of original mass remains

therefore if one half life is 5.3 years then the years required

= 2 x 5.3years = 10.6 years

Answer 2

Answer:

Answer:

10.6

Explanation:APEX

Related Questions

Which compound would most likely turn litmus paper to a red color?a. CH₃CH₂CH₂OH b. CH₃CH(Br)CH(Br)CH₃ c. CH₃CH₂CH(Br)CH₃ d. CH₃CH₂CH₂COOH e. CH₃CH₂CH₂CH₃
Determine the mass of 3.0 moles of CO2
What is the molar mass of ph
What is the name of H2S? A. sulfuric acid B. sulfurous acid C. hydrosulfurous acid D. hydrosulfuric acid
Write the atomic symbols for isotopes with the following characteristics? 1)an oxygen atom with 10 neutrons 2)a neon atom with twelve neutrons 3)25 electrons and 28 neutrons 4)a mass number of 24 and 13 neutrons 5)a titanium atom with 25 neutrons

Which of the following is a producer? A.a crow that consumes a dead animal on the side of a road

B.a fish that eats smaller fish for its food

C.a giraffe that eats the leaves of trees

D.a plant that has insect larvae feeding on its roots

Answers

D. a plant that has insect larvae feeding on its roots.

Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? TA B Block A has a higher temperature than block B heat flow The two blocks are the same temperature and heat flow stops Heatis transferred from the wamer block to the cooler block 2012 Encyclopædia Batannlea, Inc. B B heat flow

Answers

Answer:

Heat is transferred from the warmer block to the cooler block

Explanation:

Heat transfer by conduction involves two or more solids. The heat generally moves from a part at higher temperature to one with a lower temperature.

Heat transfer is based on the differences in temperature profile on a body.
When the temperature of the body is the same, heat is not transferred.
The molecules that makes up the hotter body collides with static molecules of the cold one.
Through this, heat is transferred.

During which month does the Sun appear to rise farthest north of due east for an observer in New York State?

Answers

Since the Summer solstice is when the sun is highest in the sky and the solstice is in June, that's your answer :)

Can someone how to do these problems!!

Answers

You can use the follwing equations.
pH=14-pOH
pOH=-log[OH⁻]

a) pOH=-log10⁻¹²
pOH=12
pH=14-12
pH=2

You can also use these equations:
[H⁺]=K(w)/[OH⁻] (K(w)=1.01×10⁻¹⁴)
pH=-log[H⁺]

b) [H⁺]=(1.01×10⁻¹⁴)/10⁻²M
[H⁺]=1.01×10⁻¹²M²
pH=-log(1.01×10⁻¹²)
pH=12

You can use either method. It does not really matter.
I hope this helps. Let me know if anything is unclear and when you do the calculations for c you should get pH=7.

identify the statement which is incorrect. sulphur is an integral part of cysteine glycine is an example of lipids lecithin contains phosphorus atom in its structure tyrosine possesses aromatic ring in its structure