D. Mountains and Basins.
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On January 24, 1848, James Wilson Marshall, a carpenter originally from New Jersey, found flakes of gold in the American River at the base of the Sierra Nevada Mountains near Coloma, California
I believe the answer is: Ohio state studies
The purpose of the studies were to find out what traits that a person need to become an effective leader. From the studies, they found that most leaders at lest possess these two traits as the bare minimum:
- People-oriented, which make them able to organize people to work together under a same goal
- Task oriented , they separate time to fragments that is dedicated solely to finish the taks that they need to finsih.
Answer:
An activity is something people do, a happening is just an event in which something happens. For example, an activity could be a sport while a happening could be your birthday
Explanation:
The only time that both hand valves of a manifold gauge set should be open at the same time is during system charging.
To diagnose and repair cooling or refrigeration systems, manifold gauge sets—also called HVAC gauges or refrigeration gauges—are frequently employed. They measure low- and high-refrigerant pressure using mechanical or digital gauges to identify issues like leaks or to help with system evacuation and recharge.
In manufacturing and engineering, a gauge, usually spelled gauge, is a tool used to assess if one dimension is larger or smaller than another that is used as a reference standard.
Learn more about gauge set here
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