An Object Is in Free Fall

question 12

Multiple Choice

An object is in free fall. At one instant, it travels at a speed of 50 m/s. Exactly 1 s later, its speed is about

• A)25 m/s.
• B)50 m/s.
• C)55 m/s.
• D)60 m/s.
• E)100 m/s.

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Definitions:

Lymphocytes

A type of white blood cell essential for immune responses, playing a crucial role in recognizing and fighting off pathogens.

Secondary Immune Response

The rapid production of antibodies induced by a second exposure to an antigen several days, weeks, or even months after the initial exposure.

Antigenic Determinants

Specific parts of a foreign protein or pathogen that the immune system recognizes and responds to, also known as epitopes.

Sabin Polio

A type of oral polio vaccine developed by Albert Sabin that contains a weakened form of the polio virus, used to induce immunity against poliomyelitis.