a ball is thrown upwards at the peak of its trajectory which of the following forces is acting on the ball
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ATI TEAS 7

TEAS 7 science practice questions

1. At the peak of its trajectory, what force is acting on a ball thrown upwards?

Correct answer: A

Rationale: At the peak of its trajectory, the ball momentarily stops moving upwards before it starts to fall back down. At this point, the only force acting on the ball is gravity, pulling it back towards the ground. Air resistance is negligible at the peak of the trajectory as the ball is momentarily stationary. Therefore, the correct answer is 'Gravity only.' Choices B, C, and D are incorrect. Option B is incorrect because air resistance is minimal when the ball is at its highest point and its velocity is nearly zero. Option C is incorrect as gravity is the only significant force acting on the ball at that instant. Option D is incorrect since air resistance is not a significant factor at the peak of the trajectory.

2. Which statement is true about the pH of a solution?

Correct answer: A

Rationale: The pH scale ranges from 0 to 14, with 0 being the most acidic, 7 neutral, and 14 the most basic. A solution with a pH less than 0 would be outside the defined pH range, as 0 is the lower limit. Therefore, a solution cannot have a pH less than 0. Choice B is incorrect because a pH of 7 is considered neutral, not always the pH of a solution. Choice C is incorrect because a solution's pH is influenced by its chemical composition. Choice D is incorrect as a solution with a pH of 14 is considered highly basic, not acidic.

3. The phrase labyrinths of lamplighted city contains an example of what?

Correct answer: D

Rationale: The correct answer is D, Alliteration. Alliteration is used with the repeating 'l' sound in 'labyrinths of lamplighted city.' This phrase emphasizes the visual and auditory imagery through the repetition of the 'l' sound. Choices A, B, and C are incorrect. Hyperbole would be an exaggeration not present in the phrase, simile would involve a comparison using 'like' or 'as,' and a metaphor would imply a direct comparison without the use of 'like' or 'as,' which is not found in the given phrase.

4. Which of the following is the antiparticle of a neutron?

Correct answer: C

Rationale: The antiparticle of a neutron is an antineutron, which is composed of an antiproton and an antineutrino. The antineutrino (choice A) is not the antiparticle of a neutron. A positron (choice B) is the antiparticle of an electron, not a neutron. An electron (choice D) is a fundamental particle, not an antiparticle. Therefore, the correct answer is an antiproton (choice C), as it forms an antineutron when combined with an antineutrino.

5. Based on an examination of word parts, which of the following words means 'abnormality of movement'?

Correct answer: A

Rationale: The correct answer is 'Dyskinesia.' By breaking down the word parts, 'dys-' means difficult or abnormal, and '-kinesia' refers to movement. Therefore, 'Dyskinesia' means an abnormality of movement. Choice B, 'Hyperkinesia,' is incorrect as 'hyper-' means excessive, not abnormal. Choice C, 'Akinesia,' is incorrect as 'a-' means without, not abnormal. Choice D, 'Hypokinesia,' is incorrect as 'hypo-' means deficient, not abnormal.

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