In a Vacuum System,a Container Is Pumped Down to a Pressure

question 46

Multiple Choice

In a vacuum system,a container is pumped down to a pressure of 1.33 $\times$ 10^-6 Pa at 20ºC.How many molecules of gas are there in 1 cm³ of this container? (Boltzmann's constant k = 1.38 $\times$ 10^-23 J/K)

• A)3.3 \(\times\) 10⁸
• B)4.8 \(\times\) 10⁹
• C)3.3 \(\times\) 10¹⁴
• D)7.9 \(\times\) 10¹²
• E)4.8 \(\times\) 10¹²

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Definitions:

Bystander Effect

A social psychological phenomenon in which individuals are less likely to offer help to a victim when other people are present.

Diffusion of Responsibility

A phenomenon where individuals in a group are less likely to take action or feel a sense of responsibility because the responsibility is perceived to be shared among all group members.

Darley and Latané

Psychologists known for their work on the bystander effect, demonstrating that the presence of others can decrease an individual's likelihood to help someone in distress.

Milgram's Obedience Study

Milgram's obedience study is a psychological experiment conducted in the 1960s which demonstrated the extent to which individuals would follow orders from an authority figure, even when it involves hurting someone else.