A roller coaster containing 3 cars is accelerating at 10 m/s before it comes to an abrupt stop at the end of the ride. The mass of one car is 300kg. How much force was exerted on the roller coaster to bring it to a stop?

What is a person called when they are on your side and supports you

Astudy that involves interviews of adults is eligible for expedited review. the researcher wants to add an adolescent population (aged 12 to 17) to the study and has designed a parental permission and assent process. no additional changes are planned. which of the following statements about review of the revised protocol is accurate? the research would only be eligible for expedited review if the adolescents are capable of understanding the same consent forms used for the adult population.the research would only be eligible for expedited review if the adolescents have been declared to be emancipated minors.the new research would need full review by a convened irb because children are a protected population.unless the nature of the questions would raise the level of risk to > minimal for adolescents, the research would still qualify for expedited review.

Interest groups and political action committees are both types of organizations that