A Stone Is Released from a Balloon That Is Descending

question 72

Multiple Choice

A stone is released from a balloon that is descending at a constant speed of 10 m/s.Neglecting air resistance, after 20 s the speed of the stone is:

• A)2160 m/s
• B)1760 m/s
• C)206 m/s
• D)196 m/s
• E)186 m/s

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Definitions:

Rh Incompatibility

A condition where a pregnant woman's blood type is Rh-negative and her unborn baby’s blood type is Rh-positive, potentially leading to health problems in the baby.

Rh-Positive

Refers to the presence of the Rh antigen on the surface of red blood cells, a significant factor in blood transfusion compatibility.

Rh-Negative

Refers to the absence of the Rh factor, a protein on the surface of red blood cells, significant in blood transfusion and pregnancy compatibility situations.

Rubella

A contagious viral disease characterized by a distinctive red rash, usually mild in children but can cause serious congenital defects if contracted by pregnant women.