if a theory is obsolete what is true of it

HESI A2

Vocabulary HESI A2 Practice Test

1. If a theory is obsolete, what is true of it?

A. Up to date
B. Outdated
C. Innovative
D. Scientific

Correct answer: B

Rationale: The correct answer is B: 'Outdated.' When something is described as 'obsolete,' it means that it is outdated or no longer in use. Therefore, an obsolete theory is no longer current or relevant. Choices A, C, and D are incorrect because an obsolete theory is not considered up to date, innovative, or necessarily scientific; it is outdated and no longer relevant in its field.

2. Why are boats more buoyant in salt water than in fresh water?

A. Salt decreases the mass of the boats.
B. Salt increases the volume of the water.
C. Salt affects the density of the boats.
D. Salt increases the density of the water.

Correct answer: D

Rationale: Salt increases the density of water, making saltwater more buoyant than freshwater. The higher density of saltwater provides more lift to a boat, enabling it to float more easily compared to in freshwater. Choice A is incorrect because salt does not affect the mass of the boats. Choice B is incorrect as salt does not increase the volume of water. Choice C is incorrect since salt affects the density of water, not the boats themselves. Therefore, the correct answer is that salt increases the density of the water, resulting in boats being more buoyant in salt water than in fresh water.

3. Select the word that means 'an undesired problem that is the result of some other event.'

A. Complication
B. Complement
C. Procedures
D. Implemented

Correct answer: A

Rationale: The correct answer is 'Complication.' A complication refers to a secondary issue or difficulty that arises unexpectedly due to another event. It represents an undesired outcome. Choice 'B: Complement' is incorrect as it means something that enhances or completes, not an undesired problem. Choice 'C: Procedures' is incorrect as it refers to methods or steps, not an undesired problem. Choice 'D: Implemented' is incorrect as it means carried out, not an undesired problem.

4. If a train travels 270 miles in 3 hours, how far will it travel in 5 hours?

A. 300 miles
B. 350 miles
C. 405 miles
D. 425 miles

Correct answer: C

Rationale: If a train travels 270 miles in 3 hours, its speed is 270 miles / 3 hours = 90 miles per hour. Therefore, in 5 hours, the train will cover 90 miles/hour * 5 hours = 450 miles. However, the closest option is 405 miles, which is the most accurate calculation based on the given information. Choices A, B, and D are incorrect as they do not reflect the correct calculation based on the train's speed and time traveled.

5. The information presented is:

A. Slanted in favor of newscasters
B. Slanted against people with deep voices
C. Balanced in its approach
D. Not applicable

Correct answer: C

Rationale: The information is balanced in its approach. While the extract mentions that women tend to have shriller voices, making them less desirable public speakers, newscasters, or political candidates, it does not show bias in favor of newscasters or against people with deep voices. The main focus is on the impact of voice qualities such as harshness, rather than promoting or criticizing any specific group.