Which statement identifies a long-term impact of the media on the modern political system of the United States

Concerns about the impact of the media on consumers, the scale of their existence and prejudice have existed since the 1920s. Noting that citizens have limited personal experience with government and the world, journalist and commentator Walter Lipman said the press brings ideas to citizens' minds through their stories. These ideas become part of citizens' standards and influence decisions. Lipman's remarks lead to a subcutaneous theory that information is "fired" in the mind of the recipient and is easily accepted. [1] However, studies in the 1930s and 1940s showed that information was transmitted in two stages: one person read the message and passed it to a friend. People listen to their friends, but not to those who disagree. Thus, dialogue reduces the influence of the newspaper. These findings lead to the theory of minimal impact, according to which the media has little impact on citizens and voters. [2] Until the 1970s

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the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.