Which of these methods would be most effective in allowing someone to precisely gauge the intensity level of his exercise?

a. complete the talk test
b. ask a coach
c. take his pulse
d. monitor his water intake

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

What factors characterize a healthy relationship that contributes to positive social well-being?

What kind of wound occurs the skin scrapes against a hard surface and tiny blood vessels break in the outer layer of the skin