Is it possible to do work on an object that remains at rest?
a. Yes
b. no
Ans: b. no
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In an RLC circuit, the resistance is 10. ohms, the capacitive reactance is 30. ohms, and the inductive reactance is 50. ohms. What is the circuit impedance?
A) 10. ? B) 22. ? C) 90. ? D) 63. ? E) 81. ?
On a Hertzsprung-Russell diagram, where would you find stars that have the largest radii?
A) upper right B) lower right C) upper left D) lower left
A shear force of 400 N is applied to one face of an aluminum cube having sides of 30 cm each. What is the resulting displacement of this face of the cube if the opposite face is held fixed? The shear modulus for aluminum is 2.5 × 1010 N/m2
A) 8.2 × 10-8 m B) 1.9 × 10-8 m C) 4.4 × 10-8 m D) 5.3 × 10-8 m
A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 225 grams of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 10^5 J/kg)