Chapter 15
Electric Forces and Electric Fields
Quick Quizzes
1. (b). Object A must have a net charge because two neutral objects do not attract each other. Since object A is attracted to positively-charged object B, the net charge on A must be negative. (
Chapter 12
The Laws of Thermodynamics
Quick Quizzes
1. (b). The work done on a gas during a thermodynamic process is the negative of the area under the curve on a PV diagram. Processes in which the volume decreases do positive work on the gas, while proce
Chapter 11
Energy in Thermal Processes
Quick Quizzes
1. (a) Water, glass, iron. Because it has the highest specific heat ( 4186 J kg C) , water has
the smallest change in temperature. Glass is next ( 837 J kg C ) , and iron ( 448 J kg C )
is last. (b) Iro
Chapter 10
Thermal Physics
Quick Quizzes
1. (c). When two objects having different temperatures are in thermal contact, energy is transferred from the higher temperature object to the lower temperature object. As a result, the temperature of the hotter ob
Chapter 9
Solids and Fluids
Quick Quizzes
1. (c). The mass that you have of each element is: mgold = goldVgold = 19.3 10 3 kg/m 3 1 m 3 = 19.3 10 3 kg
(
msilver = silverVsilver = 10.5 10 3 kg/m 3 2 m 3 = 21.0 10 3 kg maluminum = aluminumValuminum = 2.70 1
Chapter 8
Rotational Equilibrium and Rotational Dynamics
Quick Quizzes
1. 2. 3. 4. 5. (d). A larger torque is needed to turn the screw. Increasing the radius of the screwdriver handle provides a greater lever arm and hence an increased torque. (b). Since
Chapter 3
Vectors and Two-Dimensional Motion
Quick Quizzes
1. (c). The largest possible magnitude of the resultant occurs when the two vectors are in the same direction. In this case, the magnitude of the resultant is the sum of the magnitudes of A and B
Chapter 2
Motion in One Dimension
Quick Quizzes
1. 2. (a) 200 yd (b) 0 (c) 0
(a) False. The car may be slowing down, so that the direction of its acceleration is opposite the direction of its velocity. (b) True. If the velocity is in the direction chosen
Chapter 1
Introduction
Answers to Even Numbered Conceptual Questions
2. 4. Atomic clocks are based on the electromagnetic waves that atoms emit. Also, pulsars are highly regular astronomical clocks. (a) (b) (c) 6.
~ 0.5 lb 0.25 kg or ~10 -1 kg ~ 4 lb 2 kg
Chapter 6
Momentum and Collisions
Quick Quizzes
1. (d). We are given no information about the masses of the objects. If the masses are the same, the speeds must be the same (so that they have equal kinetic energies), and then p1 = p2 . If the masses are n
Chapter 4
The Laws of Motion
Quick Quizzes
1. (a) True. Motion requires no force. Newton's first law says an object in motion continues to move by itself in the absence of external forces. (b) False. It is possible for forces to act on an object with no r
Chapter 22
Reflection and Refraction of Light
Quick Quizzes
1. (a). In part (a), you can see clear reflections of the headlights and the lights on the top of the truck. The reflection is specular. In part (b), although bright areas appear on the roadway i
Chapter 20
Induced Voltages and Inductance
Quick Quizzes
1. b, c, a. At each instant, the magnitude of the induced emf is proportional to the rate of change of the magnetic field (hence, proportional to the slope of the curve shown on the graph). (a). All
Chapter 18
Direct-Current Circuits
Quick Quizzes
1. (a), (d). Bulb R1 becomes brighter. Connecting a wire from b to c provides a nearly zero resistance path from b to c and decreases the total resistance of the circuit from R1 + R2 to just R1. Ignoring in
Chapter 16
Electrical Energy and Capacitance
Quick Quizzes
1. (b). The field exerts a force on the electron, causing it to accelerate in the direction opposite to that of the field. In this process, electrical potential energy is converted into kinetic en
Chapter 13
Vibrations and Waves
Quick Quizzes
1. (d). To complete a full cycle of oscillation, the object must travel distance 2A to position x = - A and then travel an additional distance 2A returning to the original position at x = +A . (c). The force p