The answer to this question is d
The term that would apply to the group of research participants is called experimental group.
It was somehow succesful because the origins of the labor movement lay in the formative years of the American nation, when a free wage-labor market emerged in the artisan trades late in the colonial period. The earliest recorded strike occurred in 1768 when New York journeymen tailors protested a wage reduction. The formation of the Federal Society of Journeymen Cordwainers (shoemakers) in Philadelphia in 1794 marks the beginning of sustained trade union organization among American workers.
From that time on, local craft unions proliferated in the cities, publishing lists of “prices” for their work, defending their trades against diluted and cheap labor, and, increasingly, demanding a shorter workday. Thus a job-conscious orientation was quick to emerge, and in its wake there followed the key structural elements characterizing American trade unionism–first, beginning with the formation in 1827 of the Mechanics’ Union of Trade Associations in Philadelphia, central labor bodies uniting craft unions within a single city, and then, with the creation of the International Typographical Union in 1852, national unions bringing together local unions of the same trade from across the United States and Canada (hence the frequent union designation “international”). Although the factory system was springing up during these years, industrial workers played little part in the early trade union development. In the 19th century, trade unionism was mainly a movement of skilled workers.
Together, the number of protons and the number of neutrons determine an element's mass number. Since an element's isotopes have slightly different mass numbers, the atomic mass is calculated by obtaining the mean of the mass numbers for its isotopes
Answer:
30 minutes of moderate physical activity, at least 5 days a week.
Explanation:
Physical activity is defined as any bodily movement produced by the contraction of skeletal muscles that results in a substantial increase in caloric requirements over resting energy expenditure. Advantages of physical activity include: increased lung capacity, stronger muscles, heart health, decreased stress levels and anxiety and depression, more flexibility, greater range of movement and ultimate increased longevity.