A Proton Moving at 6

question 35

Multiple Choice

A proton moving at 6.0 × 10⁴ m/s is projected at an angle of 30° above a horizontal plane.If an electric field of 400 N/C is acting down,how long does it take the proton to return to the horizontal plane? (Hint: Ignore gravity.m_proton = 1.67 × 10−²⁷ kg,q_proton = 1.6 × 10−¹⁹ C)

• A) 7.8 × 10−⁶ s
• B) 1.6 × 10−⁶ s
• C) 7.8 × 10−⁷ s
• D) 3.9 × 10−⁶ s

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Definitions:

Representative

Someone or something that serves as a typical example of a group, class, or quality.

Experimenter Effects

Unintended influences that the experimenter's presence or actions may have on the results of an experiment.

Single-blind Studies

Experimental studies in which the participants do not know which experimental group they belong to (e.g., control or treatment), but the researchers do.

Dependent Variable

In an experiment, it is the variable that is tested and measured, expected to change as a result of manipulations of the independent variable.