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2 years ago

How long does it take for psat scores to come back

Social Studies

1 answer:

max2010maxim [7]2 years ago

8 0

Answer: It depends when you got it done, usually two-four weeks :)

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What were the findings of Professor Land and his colleagues' death penalty deterrence study of homicides in Texas from January 1

RSB [31]

Answer:

Modest short term deterrent, but will need mass executions to be effective

Explanation:

The question has already been answered but I guess you need an explanation.

In the deterrence theory by Professor Land and his colleagues, they assumes that offenders are rational, I.e. they know the law and the penalties attached to defaulting the law..

They're are three points to take note of in this study;

1. For execution to have a deterrent effect, then it means a huge number of execution must have taken place

2. Most of any deterrent effect of execution of homicide occurs immediately after the execution is made public

3. 5 to 10 homicides would deterred in a year if there are 10 to 20 executions using 0.5 homicides deterred on a monthly basis.

8 0

3 years ago

Suppose you find a rock that contains 10 micrograms of radioactive potassium-40, which has a half-life of 1.25 billion years. By

attashe74 [19]

Answer:

The rock is 3.75 billion years ago.

Explanation:

Given that:

Half life = 1.25 billion years

1 billion years = 10⁹ years

So,

Half life = 1.25 × 10⁹ years

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$k=\frac {ln\ 2}{1.25\times 10^9}\ year^{-1}$

The rate constant, k = 5.5452 × 10⁻¹⁰ years⁻¹

Initial amount [A₀] = 80 micrograms

Final amount $[A_t]$ = 10 micrograms

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

So,

$10=80\times e^{-5.5452\times 10^{-10}\times t}$

$80e^{-5.5452\times \:10^{-10}x}=10$

$\frac{80e^{-5.5452\times \:10^{-10}x}}{80}=\frac{10}{80}$

$\ln \left(e^{-5.5452\times \:10^{-10}x}\right)=\ln \left(\frac{1}{8}\right)$

$x=\frac{10^{10}\times \:3\ln \left(2\right)}{5.5452}=3.75\times 10^9$

So,

<u>The rock is 3.75 billion years ago.</u>

8 0

3 years ago

HELP MEEEEE PLEASEEEE!! QUICK!!

Studentka2010 [4]

The picture is a little hard too see

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3 years ago

Which is correct: concept to completion or conception to completion?

Flauer [41]

Concept to completion

6 0

3 years ago

Excessive withdrawal of groundwater for agricultural use rarely causes land subsidence, unlike excessive withdrawal for drinking

Tom [10]

the answer to this isfalse.............................................

3 0

3 years ago

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