I need help on this thing so much

For all machines-not just hammers- the user applies force force to the machine to the machine over a certain distance. question 1 options: input output duo none of the above

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

Melissa is fearful of men and refuses to go on dates. her therapist suggests that she is fearful because she was sexually abused when she was young. the therapist's suggestion most clearly reflects a perspective.a.) humanistic b.) behavioralc.) biological d.) psychoanalytice.) sociocultural