A brass rod, 4.0 m long and with a cross sectional area of 9.2 × 10-6 m2 is subjected to a tension of 6.0 × 103 N/m2. The Young's modulus for brass is 9.0 × 1010 N/m2, and the Poisson ratio is 0.48. By how much does the volume of the rod change?
A) 6.3 × 10-7 m3
B) 0.029 m3
C) 2.7 × 10-7 m3
D) 4.0 × 10-7 m3
E) 5.2 × 10-7 m3
E
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A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
x). What is the direction of the vibration of the wave?
A. the z direction B. the y direction C. the x direction
Work is done on an object when
a. it moves in a circle at constant speed. b. it is accelerated in a straight line. c. it is carried horizontally at constant speed. d. all of the above
A window glass that is 0.5 cm thick has dimensions of 3 m by 1.5 m. The thermal conductivity of this glass is 0.8 W/m ? K
If the outside surface of the glass is at -10°C and the inside surface is at 20°C, how much heat flows through the window in every hour? A) 50 MJ B) 60 MJ C) 70 MJ D) 80 MJ
A long wire carries a current of 3.0 A along the axis of a long solenoid (radius = 3.0 cm, n = 900 turns/m, current = 30 mA). What is the magnitude of the magnetic field at a point 2.0 cm from the axis of the solenoid? Neglect any end effects
a. 34 ?T b. 64 ?T c. 30 ?T d. 45 ?T e. 4.0 ?T