According to the office of disease prevention and health promotion of the u. s. department of health and human services, to obtain adequate physical activity for health, americans should perform

According to the United States Department of health and human services, in order to obtain sufficient physical activity for health, the Americans should perform the following activities:

1. 75 minutes per week of vigorous-intensity activity.

2. 150 minutes per week of moderate intensity activity.

3. Or, an equal combination of both moderate and vigorous-intensity activity

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the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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