An Object with a Mass of 200

question 112

Multiple Choice

An object with a mass of 200.0 kg is 500.0 km above the surface of the Earth. The magnitude of the force of gravity on the 200.0 kg mass is (G = 6.67 × 10^-11 N m²/kg², the radius of the Earth is 6.38 × 10⁶ m, and the mass of the Earth is 5.98 × 10²⁴ kg)

• A) 2.02 × 10³ N.
• B) 1.69 × 10³ N.
• C) 1.42 × 10³ N.
• D) 1.28 × 10³ N.
• E) 1.05 × 10³ N.

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Definitions:

Macrophages

Immune cells that engulf and digest cellular debris, foreign substances, microbes, and cancer cells in a process called phagocytosis.

Innate Immunity

The first line of defense in the immune system, consisting of physical, chemical, and cellular defenses against pathogens that are present from birth.

Plasma Cell

Cell derived from B cells; produces antibodies.

Antibodies

Proteins made by the immune system that are responsible for identifying and deactivating foreign entities such as viruses and bacteria.