A Ball Is Thrown Horizontally from the Top of a 20-M

question 38

Multiple Choice

A ball is thrown horizontally from the top of a 20-m high hill.It strikes the ground at an angle of 45°.With what speed was it thrown? Use g = 10 m/s².

• A)14 m/s
• B)20 m/s
• C)28 m/s
• D)32 m/s
• E)40 m/s

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Definitions:

Circadian Rhythms

Physical, mental, and behavioral changes that follow a 24-hour cycle, responding primarily to light and darkness in an organism's environment.

Biological Cycles

Natural, rhythmic processes in living organisms that can affect physical and mental states, such as circadian rhythms.

Electroencephalograph

A medical instrument used to measure the electrical activity of the brain, often used in diagnosing neurological conditions.

Electrical Activity

The movement of charged particles, such as ions, which is a fundamental process in neurons and muscle cells, and is measured in various medical and scientific applications.