A car starts from rest and accelerates uniformly for 20s to attain speed of 25ms. It maintains this speed for 30s before decelerating uniformly to rest.
The total time for the journey is 60s.
a. Sketch a velocity-time graph for the motion
b. Use the graph to determine the
c. Total distance travelled by the car,
d. Deceleration of the car.

​

Apsychologist has developed a series of personality inventories and wants to determine if they are valid. one of the scales measures perfectionism, so he asks a colleague for advice on how to establish the validity of this scale. the colleague tells him that if he were to find a sample of people with personality disorder, these people would obtain high scores on a scale that measures perfectionism.

According to thorstein veblen, a successful businessman would be most likely to demonstrate his worth to others by:

Most sociologists agree that: a. culture is central in shaping gender roles, but only in preliterate societies. b. biological factors have some influence, but cultural factors are more important determinants of gender roles. c. biological factors are influential in determining gender roles, but only in industrial or complex societies. d. biological factors only explain differences between men and women with regard to aggression and disease. e. there is no difference between the influences of culture or biology on the development of gender roles, as they are unpredictable.