PHYS 250 Final Exam 2025: University Physics Practice Test & Study Guide

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PHYS 250 ACTUAL EXAM COMPLETE QUESTIONS AND

CORRECT DETAILED ANSWERS || 100%

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A 100 g cube of ice at 0oC is dropped into 1.00 kg of water

that was originally at 80oC. What is the final temperature of

the water after the ice melts?


Select one:


a. 65oC


b. 32oC


c. 28oC


d. 0oC .......Answer.........a. 65oC

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Which of the following is the equation of motion of an oscillatory

system with a damping force, bv ?


Select one:


a. F = -bv


b. F = -kx+bv


c. F = -kx-bv


d. F = kx-bv .......Answer.........c. F = -kx-bv


What is the internal energy of 7.91 x 1022 gas molecules at a

temperature of 300 K?


Select one:


a. 164 J


b. 109 J

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c. 44.2 J


d. 492 J .......Answer.........d. 492 J


When a substance goes from a liquid state to a solid state, it

____________________.


Select one:


a. absorbs heat


b. releases heat


c. neither absorbs nor releases heat .......Answer.........b. releases

heat


Given the vectors 𝐶→=2𝑖̂ +7𝑗̂ →=2^+7�^ and 𝐷→=14𝑖̂

+38𝑗̂ �→=14�^+38�^, find the angle 𝜃� between them


Select one:

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a. 𝜃 = 86


b. 𝜃= 4∘


c. 𝜃 =0∘


d. 𝜃 = 10∘ .......Answer.........b. 𝜃= 4∘


A spider lowers herself on a single strand of silk at constant

speed. Taking into account air resistance, which of the following

must be true?


Select one:


a.The tension in the silk is zero.


b.The tension in the silk equals the spider's weight.


c.The tension in the silk is greater than the spider's weight.