t"roDlem
I'
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_ ._ .
1. Determine the angular speed, in rad/s, of (a) Earth about its axis; (b) the minute hand of a clock; (c) the hour hand of a clock; (d) an egg beater ','turning at 300 rpm.
Splution
The angular speed is w A8/At .(a) WE 1 re
CHAPTER 22
THE SECOND LAW OF THERMODYNAMICS
Solution
(a) There are 2 directions for each molecule, so the number of states is 24 = 16. (b) Two of these, all to the right or all to the left, have all molecules moving in the same direction. (c) If all state
PART 3
THERMODYNAMICS TEMPERATURE AND HEAT
Solution
Temperature dierences on the Fahrenheit and Celsius scales are related by TF = (9/5) TC , so ( 9 ) 5 (10 C ) = 18 F. (Note that a temperature dierence and a temperature reading are not the same, even tho
PART 2
OSCILLATIONS, WAVES, AND FLUIDS OSCILLATORY MOTION
cos[(10 s1 )t]. (b) The maximum (positive) velocity occurs at t = 0 if sin = 1 (from Equation 15-10), therefore, the motion is described by Equation 15-9 with A = 2.5 cm, = 5 s1 , and = /2. Since c
CHAPTER 14
STATIC EQUILIBRIUM
Problem
2. A body is subject to three forces: F1 = 2^ + 2^ N, i applied at the point x = 2 m, y = 0 m; F2 = -2^ - i 3^ N, applied at x = -1 m, y = 0; and F3 = 1^ N, applied at x = -7 m, y = 1 m. (a) Show explicitly that the n
CHAPTER 13
ROTATIONAL VECTORS AND ANGULAR MOMENTUM
ActivPhysics can help with these problems: Activities 7.1, 7.16, 7.17 Section 13-1: Angular Velocity and Acceleration Vectors Problem
1. A car is headed north at 70 km/h. Give the magnitude and direction
CHAPTER 12
ROTATIONAL MOTION
Problem
4. A 25-cm-diameter circular saw blade spins at 3500 rpm. How fast would you have to push a straight hand saw to have the teeth move through the wood at the same rate as the circular saw teeth?
ActivPhysics can help wi
CHAPTER 9
GRAVITATION
radius. Thus, R/RE = 1/ 3 = 57.7% gives the new, shrunken radius.
ActivPhysics can help with these problems: Activity 4.8 Section 9-2: The Law of Universal Gravitation Problem
1. Space explorers land on a planet with the same mass a
CHAPTER 21
HEAT, WORK, AND THE FIRST LAW OF THERMODYNAMICS
750 J of work on its surroundings. By how much does the internal energy of the gas change?
ActivPhysics can help with these problems: Activities 8.58.13 Section 21-1: The First Law of Thermodynami
CHAPTER 20
THE THERMAL BEHAVIOR OF MATTER
Problem
4. An ideal gas occupies a volume V at 100 C. If the gas pressure is held constant, by what factor does the volume change (a) if the Celsius temperature is doubled and (b) if the kelvin temperature is doub
CHAPTER 18
FLUID MOTION
density of the compressed air? (b) How large a volume would the same gas occupy at typical 3 atmospheric density of 1.2 kg/m ?
Section 18-1: Describing Fluids: Density and Pressure Problem
1. The density of molasses is 1600 kg/m .
CHAPTER 16
WAVE MOTION
1.25 m apart. What is the speed of the waves on the cable? Compare with the speed of light in vacuum.
ActivPhysics can help with these problems: Activities 10.1, 10.2, 10.7, 10.10 Section 16-2: Wave Properties Problem
1. Ocean waves
CHAPTER 5 FORCE AND MOTION
ActivPhysics can help with these problems: All activities in Section 2, Forces and Motion Section 5-4: Newton's Second Law Problem
1. A subway train has a mass of 1.5x106 kg. What force is required to accelerate the train at 2.5
CHAPTER 6
USING NEWTON'S
LAWS
ActivPhysics can help with these problems: All Activities in Section 2 "Forces and Motion" and Section 4 "Circular Motion." Section 6-1: Using Newton's Second Law Problem
1. Two forces, both in the x-y plane, act on a 1.5-kg
CHAPTER 7
WORK, ENERGY, AND POWER
How much work do you do on the barbell during this time? (c) You lower the barbell to the ground. Now how much work do you do on it?
ActivPhysics can help with these problems: Activity 5.1 Section 7-1: Work Problem
1. How
PH1004 Exp 6:
Thermal Conductivity
PH 1004 Laboratory Instructions Experiment 6
Thermal Conductivity
Introduction
Heat is thermal energy, which is transferred from one place to another due to a temperature difference. In the SI system of measurement, the
PH1004
Exp 5: Acceleration Due To Gravity. Free Fall and Pendulum.
PH 1004 Laboratory Instructions Experiment 5
Acceleration Due to Gravity. Free Fall and Pendulum.
Introduction
Both the free fall of a body and the oscillation of a simple pendulum occur d
PH1004 Exp 4:
Rotational Motion. Moment of Inertia.
PH 1004 Laboratory Instructions
Experiment 4 Rotational Motion. Moment of Inertia.
Introduction
Previous experiments dealt with the effect of a force on the linear motion of an object that could be assum
PH1004
Exp 3: Collisions
PH 1004 Laboratory Instructions Experiment 3
Collisions
Background
A collision is an isolated event in which each colliding particle exerts a force on one or more other particles for a relatively short period of time. Collisions c
PH1004
Exp 2: Forces
PH 1004 Laboratory Instructions Experiment 2
Forces
Background
Newton's first law states that an object at rest remains at rest unless acted upon by an outside force, and an object in motion continues to travel at constant velocity un
PH1004 laboratory Instructions
Exp 1: One Dimensional Motion
PH 1004 Laboratory Instructions
Experiment 1
One Dimensional Motion
Background
The displacement of an object is defined as change in its position. In this experiment you will investigate objects
,"
Problem
3. A 62-kg parachutist hits the ground moving at 35'km/hand come~ to a stop in 140 IUS.Find the ' average impulsive force on the chutist, and compare 1with the chutist's weight.
Problem
17. In a railroad switchyard, a 56-ton freight car is se'n
Problem Section 10-1: Center of Mass
,9. Find the center of mass of a pentagon of side a with one triangle missing, as shown in Fig. 10-24. Hint: See Example 10-3, and treat the pentagon as a group of triangles.
_-Pro61~m1. A 28-kg child sits at one end o
CONSERVATION OF ENERGY
'CtivPhysiCS can help with these Problems: ji.u Activities in Section 5, Work and Energy
0$ y:;: e, followed by dr=idx for y = i and 0$ x:$ and (b) dr=idx+jdy=(i+j)dy, for 0 :$ y :$ e (since x = y along this path). The work done by
Problem
9. A 12-N force is applied at the point x = 3 m, y= 1 rn. Find the torque about the origin if the force points in (a) the x ,direction, (b) the y iidirection,and (c) the z ditection.
Problem
27. 'Fwo identical 1800-kg cars are traveling in o
Problem Section 10-1: Center of Mass
,9. Find the center of mass of a pentagon of side a with one triangle missing, as shown in Fig. 10-24. Hint: See Example 10-3, and treat the pentagon as a group of triangles.
_-Pro61~m1. A 28-kg child sits at one
CONSERVATION OF ENERGY
'CtivPhysiCS can help with these Problems: ji.u Activities in Section 5, Work and Energy
0$ y:;: e, followed by dr=idx for y = i and 0$ x:$ and (b) dr=idx+jdy=(i+j)dy, for 0 :$ y :$ e (since x = y along this path). The work don
CHAPTER 7
WORK, ENERGY, AND POWER
How much work do you do on the barbell during this time? (c) You lower the barbell to the ground. Now how much work do you do on it?
ActivPhysics can help with these problems: Activity 5.1 Section 7-1: Work Problem