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Nursing Elites

ATI TEAS 7

physics

1. What phenomenon occurs when a wave encounters a change in medium causing a change in its speed and direction?

Correct answer: a

Rationale: Refraction happens when a wave changes its speed and direction due to encountering a change in medium.

2. What is the role of the appendix, a small pouch attached to the large intestine?

Correct answer: B

Rationale: While the exact function of the appendix is still debated, it likely houses lymphoid tissue, contributing to the immune system.

3. Skeletal muscles are attached to bones by tough connective tissues called

Correct answer: B

Rationale: The correct answer is B: Tendons. Skeletal muscles are connected to bones by tendons, which are tough connective tissues that transmit the force generated by the muscle to the bone, allowing movement. Ligaments (A) connect bone to bone and provide stability to joints. Cartilage (C) is a smooth, firm tissue that covers the surface of bones at joints, reducing friction and absorbing shock. Fascia (D) is a connective tissue that surrounds muscles and other structures, providing support and protection.

4. A guitar string vibrates at a fundamental frequency of 440 Hz. What is the frequency of the second harmonic (first overtone)?

Correct answer: C

Rationale: Harmonics have frequencies that are multiples of the fundamental frequency. The second harmonic has a frequency twice the fundamental, so it's 440 Hz * 2 = 880 Hz.

5. What is the process by which muscles convert chemical energy (ATP) into mechanical energy (movement)?

Correct answer: D

Rationale: The correct answer is D, the sliding filament theory. This theory explains how muscle contraction occurs at a molecular level. During muscle contraction, actin and myosin filaments slide past each other, causing the muscle to shorten and generate movement. This process requires the conversion of chemical energy stored in ATP into mechanical energy to power muscle contractions. Options A and B, photosynthesis and cellular respiration, involve energy production in plants and cells but are not directly related to muscle movement. Option C, muscle contraction, is a broad term that encompasses the entire process of muscle movement, while option D specifically addresses the molecular mechanism behind muscle contraction.

6. What is the relationship between the frequency and wavelength of a wave?

Correct answer: a

Rationale: Frequency and wavelength have an inverse relationship - as one increases, the other decreases.

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