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Nursing Elites

ATI TEAS 7

physics

1. What is the relationship between mass and weight on Earth's surface?

Correct answer: a

Rationale: On Earth's surface, mass and weight are directly proportional but not equal, as weight is the force due to gravity acting on an object's mass.

2. What is the term for the chemical reaction that involves the loss of electrons?

Correct answer: b

Rationale: Oxidation is the chemical reaction that involves the loss of electrons. The other choices describe different types of reactions.

3. What is the term for a substance that can act as both a proton donor and a proton acceptor?

Correct answer: C

Rationale: Amphiprotic substances can act as both a proton donor and a proton acceptor. The other choices are specific to either acids or bases.

4. The energy released during a chemical reaction is called:

Correct answer: D

Rationale: Exothermic means "outward heat," indicating energy is released during the reaction.

5. What is the main component of sweat?

Correct answer: C

Rationale: Rationale: - Sweat is primarily composed of water, making up the majority of its content. Water helps regulate body temperature by evaporating from the skin's surface, which cools the body down. - While sweat does contain small amounts of other substances like urea, glucose, and electrolytes, water is the main component that is secreted by sweat glands to help regulate body temperature during physical activity or in response to heat.

6. What is the principle behind optical fibers used in communication?

Correct answer: C

Rationale: Optical fibers used in communication rely on the principle of total internal reflection guiding light through the fiber core. When light enters the fiber at a certain angle, it reflects off the boundary between the core and cladding, ensuring that the light remains trapped within the core and travels along the fiber without significant loss of signal. This total internal reflection allows for efficient transmission of light signals over long distances in optical communication systems.

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