ATI TEAS 7
Physics
1. What happens to the speed of a sound wave when it travels from air to water?
- A. It increases because water is denser.
- B. It decreases because water is denser.
- C. It remains the same.
- D. Speed depends on the frequency, not the medium.
Correct answer: A
Rationale: Sound waves travel faster in denser mediums like water compared to air due to stronger interactions between particles.
2. Identify the type of clause in the sentence "When the clock struck midnight, the magic began."
- A. Main clause
- B. Subordinate clause
- C. Appositive clause
- D. Noun clause
Correct answer: B
Rationale: The "when" clause introduces additional information about the main sentence and acts as a subordinate clause.
3. Delta waves, associated with deep sleep, exhibit what frequency range?
- A. 0.5-4 Hz
- B. 4-8 Hz
- C. 8-13 Hz
- D. 13-30 Hz
Correct answer: A
Rationale: Delta waves are slow brainwaves that are typically associated with deep sleep stages, such as stages 3 and 4 of non-REM sleep. These waves have a frequency range of 0.5-4 Hz, making option A the correct answer. During deep sleep, the brain slows down significantly, and delta waves are prominent on an electroencephalogram (EEG). The frequency range of 4-8 Hz corresponds to theta waves, which are more commonly observed during light sleep or drowsiness. Alpha waves fall within the 8-13 Hz range and are typically seen when an individual is awake but relaxed. Beta waves, ranging from 13-30 Hz, are associated with alertness and active thinking. Therefore, option A is the correct choice for delta waves, reflecting their slow frequency characteristic during deep sleep.
4. The muscular chamber of the heart that receives blood from the body and pumps it to the lungs is the:
- A. Right atrium
- B. Left atrium
- C. Right ventricle
- D. Left ventricle
Correct answer: C
Rationale: The correct answer is C: Right ventricle. The right ventricle receives deoxygenated blood from the body and pumps it to the lungs for oxygenation. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle. The left atrium receives oxygenated blood from the lungs and passes it to the left ventricle. The left ventricle then pumps oxygenated blood to the rest of the body. Understanding the flow of blood through the heart chambers is essential for grasping the functions of each chamber in the circulatory system.
5. A car is traveling at a constant speed on a straight road. What is the net force acting on the car?
- A. A force equal to its weight pushing upwards
- B. A force equal to its weight pushing downwards
- C. A force equal to its engine power pushing forward
- D. No net force
Correct answer: D
Rationale: Since the car's speed is constant, there is no acceleration, and according to Newton's first law, a net force of zero is required.
6. Elements tend to gain or lose electrons to achieve stable electron configurations like those of noble gases. Their group number often indicates the number of electrons gained/lost and the resulting ionic charge, providing a good starting point for prediction.
- A. Ionic bonds involve electron sharing, while metallic bonds involve electron transfer
- B. Ionic bonds are weak and directional, while metallic bonds are strong and non-directional
- C. Ionic bonds exist between metals and non-metals, while metallic bonds exist only between metals
- D. Ionic bonds form discrete molecules, while metallic bonds form extended structures
Correct answer: D
Rationale: Ionic bonds involve complete electron transfer between atoms, creating strong, non-directional electrostatic attraction. Metallic bonds involve a delocalized "sea" of electrons shared across all metal atoms, resulting in a strong, extended structure.
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