Answer:
It is the third-lightest halogen, and is a fuming red-brownliquid at room temperature that evaporates readily to form a similarly coloured gas. Its properties are thus intermediate between those of chlorine and iodine. .
The isotopes half life is 2 hours
Since given the following :
time = 8 hours × 3600s/hr = 28800 seconds
A₀ = 80 Bq as the first registration of detector counts per second
A = 5 Bq as the registration of detector counts per second eight hours later
Using the formula:
∴ A = A₀ e^-λt
∴ A/A₀ = e^-λt
∴ ln (A/A₀) = -λt
∴ λ = -ln (A/A₀) /t = ln2 / t_{1/2}
∴ t_{1/2} = -ln2 / ln(A/A₀) (t)
∴ t_{1/2} = -ln2 / ln(5/80) (8 hours) = 2 hours
Answer:
Compound-Complex sentence
Explanation:
compound-complex sentence is a type of sentence that is comprised of atleast two independent clauses also it is characterised by having one or more dependent clauses.
Among all types of sentences, compound-complex sentences are usually the most complicated as well as the longest. This is usually the point because it is made up of two sentence structures; compound and complex sentence structure.
An example of a compound complex sentence below;
Though Mike prefers watching high school films, he rented the latest spy thriller, and he enjoyed it very much.
Answer:
0.04 m
Explanation:
The harmonic is given by λ = 2L/n were L= length of guitar string = 1.75 m and n = harmonic = 78.
So, λ = 2L/n = λ = 2 × 1.75 m/78 = 0.044 m ≅ 0.04 m
Answer:Its B
Explanation:Trust Me i done This Before