Where is the pic for this so I can answer
The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
Learn more about internal validity on:
brainly.com/question/968894
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COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
The up-menu list for the sentence which explains the industralization and its impact on the economy includes:
- urbanization
- high school graduates
- Offshoring
- 7.5 million
<h3>What is
industralization?</h3>
An industralization means the development of industries in a region which plays an instrumental role in the economic development of the world
<h3>
Correct drop-downs includes:</h3>
- Industrialization went hand-in-hand with <u>urbanization</u><u>.</u>
- The industrial economy helped create robust growth in the united states for many decades. plentiful manufacturing and industrial jobs meant that <u>high school graduates</u> could enter the job market making a good wage.
- But as the economy began to transform once more, from an industrial to a postindustrial system, the nature of work changed as well.
- <u>Offshoring</u> led to a decline in manufacturing jobs: with about <u>7.5 million</u> jobs lost since 1980.
In conclusion, the emergence of Industrialization is an imporant event that impact the world economy at large.
Read more about Industrialization
<em>brainly.com/question/1078028</em>
Answer: Twice the previous time would be taken to reach the same speed v with the puck of mass 2m.
Explanation:
Let a Force pushes the hockey puck of mass m.
Then acceleration, a= \frac{F}{m}a=mF
From the equation of motion,
\begin{gathered}\➪ v=u+at\\ v=0+\frac{F}{m}\Delta t\end{gathered}⇒v=u+atv=0+mFΔt ......(1)
In the second case, when mass is 2m, then acceleration,
a'=\frac{F}{2m}a′=2mF
and t' is the time taken.
The final speed is v,
\begin{gathered}\➪ v=0+ a't'\\ \➪ \frac {F}{m}\Delta t=\frac{F}{2m}t'\\ \➪ t'= 2\Delta t\end{gathered}⇒v=0+a′t′⇒mFΔt=2mFt′⇒t′=2Δt using equation (1)
Hence, it would take two times the previous amount of time to push the pluck of double mass.
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