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garri49 [273]
3 years ago
14

Dr. Dawson is conducting a study with military veterans from the Vietnam and Gulf wars. He plans to evaluate them every year for

10 years to see if those with PTSD have a more pronounced decline in mental abilities and overall memory. This is a(n) ________ study.
a) longitudinal
b) experimental
c) cross-sectional
d) chronological
Social Studies
1 answer:
cupoosta [38]3 years ago
5 0

Answer:

a) longitudinal

Explanation:

  • Studies can be observational (when no intervention happens) or experimental (when a variable is manipulated, an experiment is conducted).
  • Observational studies, based on time, are classified as longitudinal or cross-sectional.
  1. Longitudinal studies follow the same group of people during a determined period of time.
  2. Cross-sectional studies are defined as "snap shots", they compare different groups of people at one specific moment of time.
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North Africa is mostly desert. But the ancient Egyptians found that they could grow crops by irrigation ditches from the Nile River

Explanation:

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A driver was driving his car negligently along a mountain road. He lost control of his car and careened over the side of a cliff
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Answer:

B) The excitement of the accident and the speedy response of the rescuer would be considered in a case such as this.

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Watching television shows can be a good way to understand and study families because:
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3 years ago
Besides The United States, What other countries claimed territory on the continent of North America?
larisa86 [58]
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Particulate material that quickly loses its energy as it travels through the air, has limited penetrating power, and can be stop
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Particulate material that quickly loses its energy as it travels through the air, has limited penetrating power, and can be stopped by clothing or a sheet of paper is known as <u> alpha particles</u>

<h3>What is penetrating power of radiation?</h3>

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Comparing only  three common types of ionizing radiation, the alpha particle has the largest mass. Due to the large mass of the alpha particle, it has the highest ionizing strength and greatest tissue damage potential. However, the  same large size of these alpha particles makes them less likely to penetrate matter. Alpha particles have the least penetrating power and can be stopped by a thick sheet of paper or even a layer of clothing. They are also blocked by the outer layer of dead skin on the body. This seems to remove the threat of alpha particles, but only from outside sources.

To learn more about penetrating power power from given link

brainly.com/question/9815840

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