ATI TEAS 7
Physics
1. Two cars with different masses collide head-on. Which car experiences a greater change in momentum?
- A. The car with the larger mass
- B. The car with the smaller mass
- C. Both cars experience the same change in momentum
- D. It depends on the initial velocities of the cars
Correct answer: B
Rationale: The car with the smaller mass. Although momentum is conserved in the collision, the change in momentum is inversely proportional to mass. Therefore, the car with the smaller mass will experience a larger relative change.
2. Which property of a wave determines its pitch in sound waves?
- A. Amplitude
- B. Frequency
- C. Wavelength
- D. Speed
Correct answer: B
Rationale: The pitch of a sound wave is determined by its frequency. Frequency refers to the number of cycles of a wave that occur in a unit of time, usually measured in hertz (Hz). Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. Amplitude refers to the height of a wave and is related to the loudness of the sound. Wavelength is the distance between two consecutive points in a wave that are in phase, and speed is the rate at which a wave travels through a medium.
3. Which of the following is an example of an unsaturated fatty acid?
- A. Stearic acid
- B. Palmitic acid
- C. Oleic acid
- D. Butyric acid
Correct answer: C
Rationale: Oleic acid is an unsaturated fatty acid, containing at least one double bond in its hydrocarbon chain. The other choices are saturated fatty acids.
4. The main idea of the passage is that
- A. history solely teaches us about past events and has no relevance to the present.
- B. understanding history is crucial for comprehending current trends and shaping the future.
- C. historical knowledge is merely an interesting collection of facts with no practical value.
- D. learning from history requires solely focusing on its successes and ignoring its failures.
Correct answer: B
Rationale: Choice B accurately captures the passage's emphasis on history's multifaceted impact, providing insights into the present and potential visions for the future.
5. What is the myelin sheath and what does it do?
- A. A group of nerve cells that perform a specific function.
- B. A fatty substance that insulates some nerve fibers.
- C. A fluid-filled cavity within the brain.
- D. The junction between two neurons.
Correct answer: B
Rationale: The correct answer is B. The myelin sheath is a fatty substance that insulates some nerve fibers. It is essential for the proper functioning of the nervous system as it acts as an insulator, allowing for faster transmission of nerve impulses along the axon. Without the myelin sheath, nerve signals could be disrupted or weakened, leading to issues with movement, sensation, and other neurological functions. Options A, C, and D are incorrect as they do not accurately describe the myelin sheath or its function.
6. Which of the following is a characteristic of alkenes?
- A. They have a double bond between carbon atoms.
- B. They are saturated hydrocarbons.
- C. They contain only single bonds.
- D. They are derivatives of ammonia.
Correct answer: A
Rationale: Alkenes have a double bond between carbon atoms, making them unsaturated hydrocarbons. The other choices do not accurately describe alkenes.
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