When P and S waves hit the surface they transform into surface waves. P and S waves are signatures of fracture rock or earthquake. When a fracture occurs it sends energy out i â¦ n all directions. P, or primary wave is the initial large shock of the earthquake. This travels through anything.
Weekly Cardio Minimum. The Centers for Disease Control and Prevention recommend that all adults engage in at least 2 1/2 hours of moderate aerobic activity per week. If you do intense cardio, you can get away with half that time. You may spread your exercise over as many days of the week as you like, as long as each session lasts at least 10 minutes. In addition, the CDC recommends that all adults engage in some physical activity for 30 minutes a day, at least five days a week.
There is no definitive answer to this question and the right amount of exercise will vary from person to person. The Department of Health recommends 150 minutes of moderately strenuous physical activity per week. This equates to 30 minutes of activity per day, for at least five days a week.This can be broken up into shorter sessions throughout the day, with each session lasting a minimum of 10 minutes.For example, it could be a 15-minute walk to the local shops, and then housework or gardening tasks in the afternoon.his equates to 30 minutes of activity per day, for at least five days a week. This can be broken up into shorter sessions throughout the day, with each session lasting a minimum of 10 minutes.