How large a force is necessary to stretch a 2.0-mm diameter copper wire (Y = 11 × 10^10 N/m2) by 1.0%?

a. 2.1 kN
b. 3.5 kN
c. 6.9 kN
d. 11 kN
e. 5.4 kN

b

Physics & Space Science

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A 4.00-L container holds half a mole of an ideal gas at a pressure of 18.5 atm. What is the gas temperature? (R = 0.0821 L • atm/mol • K)

a. 1800 K c. 901 K b. 1190 K d. 450 K

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What is the equivalent resistance between points A and B in the figure when R = 18 ??

A. 48 ? B. 64 ? C. 80 ? D. 96 ? E. 110 ?

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A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2 . For the next 20 s, the acceleration of the particle is -1.0 cm/s2 . What is the position of the particle at the end of this motion?

a. zero b. +3.0 m c. -1.0 m d. +2.0 m e. -3.0 m

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Which of the following best describes nuclear forces?

a. They are short ranged. b. They go to zero at r = 0. c. They are long ranged like the Coulomb force. d. They are charge independent.

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Physics & Space Science