EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.6th EditionHewitt Publisher: PEARSON COISBN: 9780134091983
EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.
Solutions for EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER.
Problem 2RCQ:
When a ball is hit with a given force, why does contact over a long time impart more speed to the...Problem 3RCQ:
Why is it a good idea to extend your bare hand forward when you are getting ready to catch a...Problem 4RCQ:
Why is it poor judgment to have the back of your hand up against the outfield wall when you catch a...Problem 7RCQ:
If a ball has the same speed just before being caught and just after being thrown, in which case...Problem 10RCQ:
When a cannonball is fired, momentum is conserved for the system of cannon + cannonball. Would...Problem 11RCQ:
Railroad car A rolls at a certain speed and makes a perfectly elastic collision with car B of the...Problem 12RCQ:
If the equally massive railroad cars of Question 11 couple together after colliding inelastically,...Problem 13RCQ:
When is energy most evident?Problem 14RCQ:
Cite an example in which a force is exerted on an object without doing work on the object.Problem 15RCQ:
Which requires more work: lifting a 50-kg sack a vertical distance of 2 m or lifting a 25-kg sack a...Problem 16RCQ:
A car is raised a certain distance in a service station lift and therefore has potential energy...Problem 17RCQ:
Two cars are raised to the same elevation on service station lifts. If one car is twice as massive...Problem 18RCQ:
If a moving car speeds up until it is going three times as fast as it was, how much kinetic energy...Problem 19RCQ:
What is the relationship between work and power?Problem 20RCQ:
What is the relationship between the gain in kinetic energy and the work when work is done?Problem 21RCQ:
Compared with the work that the brakes must supply to stop a car moving at some original speed, how...Problem 22RCQ:
What will be the kinetic energy of the ram of a pile driver when it suddenly undergoes a 10-kJ...Problem 23RCQ:
An apple hanging from a limb has potential energy because of its height. If the apple falls, what...Problem 24RCQ:
Can a machine multiply input force? Input distance? Input energy? (If your three answers are the...Problem 25RCQ:
If a machine multiplies force by a factor of 4, what other quantity is diminished, and by how much?Problem 26RCQ:
What is the efficiency of a machine that miraculously converts all the input energy to useful output...Problem 28RCQ:
What is the ultimate source of the energy supplied by fossil fuels, dams, and windmills?Problem 29RCQ:
What is the ultimate source of geothermal energy?Problem 30RCQ:
Can we correctly say that hydrogen is a relatively new source of energy? Why or why not?Problem 35PAC:
Show that the momentum for a 2-kg brick parachuting straight downward at a constant speed of 8 m/s...Problem 36PAC:
Show that the impulse on a baseball that is hit with 100 N of force in a time of 0.5 s is 50 N.s.Problem 37PAC:
Show that when a 10-kg cart undergoes a 2.0-m/s increase in speed, the impulse on the cart is 20 N ...Problem 38PAC:
Show that when an impulse produced by a 12-N force acts over 2.0 s on an ice puck initially at rest...Problem 39PAC:
Show that 2.4 J of work is done when a force of 2.0 N moves a book 1.2 m. (1 N1 m = 1 J)Problem 41PAC:
Show that when a 3.0-kg book is lifted 2.0 m, its increase in gravitational potential energy is 60...Problem 42PAC:
Show that the gravitational potential energy of a 1000-kg boulder raised 5 m above ground level is...Problem 43PAC:
Show that the kinetic energy of a 1.0-kg book tossed across the room at a speed of 3.0 m/s is 4.5 J....Problem 45PAC:
Show that 24 J of work is done when a 3.0-kg block of ice is moved from rest to a speed of 4.0 m/s.Problem 46PAC:
Show that a 2,500,000-J change in kinetic energy occurs for an airplane that is moved 500 m in...Problem 48PAC:
Show that nearly 786 W of power is expended when a 500-N barbell is lifted 2.2 m above the floor in...Problem 49PAC:
Show that the efficiency of a machine that has an input of 100 J and an output of 40 J is 0.40.Problem 50TAS:
In Chapter 1 we learned that acceleration a=vt, and in Chapter 2 we learned that the cause of...Problem 51TAS:
A 10-kg bag of groceries is tossed onto a table at 3 m/s and slides to a stop in 2 s. Begin with the...Problem 52TAS:
An ostrich egg of mass m is tossed at a speed v into a sagging bed sheet and is brought to test in a...Problem 53TAS:
A 6-kg bail rolling at 3 m/s bumps into a pillow and stops in 0.5 s. (a) Show that the force exerted...Problem 54TAS:
At a baseball game, a ball of mass m = 0.15 kg moving at a speed v = 30 m/s is caught by a fan. (a)...Problem 55TAS:
Jeannie Beanie (mass 40 kg), standing on slippery ice, catches her leaping dog, Daisy (mass 20 kg),...Problem 56TAS:
A railroad diesel engine weighs four times as much as a freight car. The diesel engine coasts at 5...Problem 57TAS:
A 5-kg fish swimming at 1 m/s swallows an absent-minded 1-kg fish swimming toward it at a velocity...Problem 58TAS:
Little Hudson (next page) holds the 10-kgbarbell 0.3 m above the floor. (a) What is the PE of the...Problem 59TAS:
It you push a crate horizontally with a force of 100 N across a 10-m factory floor, and the friction...Problem 60TAS:
A simple lever is used to lift a heavy load. When a 60-N force pushes one end of the lever downward...Problem 61TAS:
The following questions refer to Problem 60: (a) How much work is done by the 60-N force? (b) What...Problem 62TAS:
In raising a 6000-N piano with a pulley system, the movers note that for every 2 m of rope pulled...Problem 63TAS:
The girl steadily pulls her end of the rope upward a distance of 0.4 m with a constant force of 50...Problem 64TAS:
How many watts of power do you expend when you exert a force of 6 N that moves a book 2 m in a time...Problem 65TAS:
Show that 480 W of power is expended by a weightlifter who lifts a 60-kg barbell a vertical distance...Problem 66TAS:
When an average force F is exerted over a certain distance on a shopping cart of mass m, its kinetic...Problem 67TAS:
Emily holds a banana of mass m over the edge of a bridge of height b. She drops the banana, and it...Problem 68TAS:
Starting from rest, Megan Zooms down a frictionless slide from an initial height of 4.0 m. Show that...Problem 69TAR:
The balls have different masses and speeds. Rank the following from greatest to least: (a) Momentum,...Problem 70TAR:
Jogging Jake runs along a train flatcar that moves at the velocities shown. In each case, Jakes...Problem 71TAR:
Starting from rest, Marshall pushes crates across the floor of his classroom tor 3 seconds with a...Problem 72TAR:
A ball is released from rest at the left of the metal track shown. Assume it has only enough...Problem 73TAR:
The roller coaster ride starts from rest at point A. Rank, from greatest to least, the following...Problem 75E:
A lunar vehicle is tested on Earth at a speed of 12 km/h. When it travels at that same speed on the...Problem 76E:
In terms of impulse and momentum, why do airbags in cars reduce the chances of injury in accidents?Problem 78E:
If you throw a raw egg against a wall, youll break it; but if you throw it with the same speed into...Problem 79E:
In terms of impulse and momentum, when a boxer is being hit, why is it important that he or she move...Problem 80E:
To throw a ball, do you exert an impulse on it? Do you exert an impulse to catch it if its traveling...Problem 81E:
Bronco dives from a hovering helicopter and finds his momentum increasing. Does this violate the...Problem 82E:
A pair of skaters who are initially at rest push against each other so that they move in opposite...Problem 83E:
When you are traveling in your car at highway speed, the momentum of a bug is suddenly changed as it...Problem 84E:
You are at the front of a floating canoe near a dock. You leap, expecting to land on the dock...Problem 85E:
If you throw a ball horizontally while standing on a skateboard, you roll backward with a momentum...Problem 86E:
A fully dressed person is at rest in the middle of a pond on perfectly frictionless ice and must get...Problem 88E:
In the previous chapter, rocket propulsion was explained in terms of Newtons third law. That is, the...Problem 89E:
When vertically falling sand lands in a horizontally moving cart, the cart slows. Ignore any...Problem 90E:
In a movie, the hero jumps straight down from a bridge onto a small boat that continues to move with...Problem 91E:
Freddy Frog drops vertically from a tree onto a horizontally moving skateboard. The skateboard...Problem 92E:
If your friend pushes a stroller four times as far as you do while exerting only half the force,...Problem 93E:
Which requires more work: stretching a strong spring a certain distance or stretching a weak spring...Problem 94E:
Two people of the same weight climb a flight of stairs. The first person climbs the stairs in 30 s,...Problem 95E:
Why do you run out of breath when running up the stairs not when walking up the stairs?Problem 96E:
A friend says that when twice as much works is done on a wagon, it will gain twice as much kinetic...Problem 97E:
Compared with a pickup truck moving at a certain speed and braking to a stop, how much work must the...Problem 98E:
When a cannon with a long barrel is fired, the force of expanding gases acts on the cannonball for a...Problem 99E:
At what point in its motion is the KE of a pendulum bob at a maximum? At what point is its PE at a...Problem 100E:
A physics instructor demonstrates energy conservation by releasing a heavy pendulum bob, at shown,...Problem 101E:
On a playground slide, a child has potential energy that decreases by 1000 J while her kinetic...Problem 102E:
Consider the identical balls released from rest on tracks A and B, as shown. When they reach the...Problem 104E:
In the absence of air resistance, a snowball thrown vertically upward with a certain initial KE...Problem 105E:
Youre on a rooftop and you throw one snowball down-ward to the ground below and another upward. The...Problem 106E:
When a driver applies the brakes 10 keep a car going down-hill at constant speed and constant...Problem 107E:
When the mass of a moving object is doubled, with no charge in speed, by what factor is its momentum...Problem 108E:
When the velocity of an object it doubled, by what factor is its momentum changed? By what factor is...Problem 109E:
Which, if either, has greater momentum a 1-kg ball moving at 2 m/s or a 2-kg ball moving at 1 m/s?...Problem 112E:
Two lumps of clay with equal and opposite momenta have a head on collision and come to rest. Is...Problem 113E:
Consider Charlottes swinging-balls apparatus. If two balls are lifted and released, momentum is...Problem 114E:
Discuss the physics that explains how the girl in Figure 3.29 can jack up a car while applying so...Problem 115E:
Why bother using a machine if it cannot multiply work input to achieve greater work output?Problem 116E:
In the pulley system shown, Block A has a mass of 10 kg and is suspended precariously at rest....Problem 117E:
If an automobile had a 100% efficient engine, transfer-ring all of the fuel's energy to work, would...Problem 118E:
The energy we need to live comes from chemically stored potential energy in food, which is...Problem 119E:
To combat wasteful habits, we often speak of "conserving energy" by turning off lights, heating or...Problem 121E:
What is the argument that the energy provided by a hydrogen fuel cell is actually solar energy?Problem 124DQ:
Railroad cars are loosely coupled so that there is a noticeable delay between the time the first car...Problem 125DQ:
Your friend says that the law of momentum conservation is violated when a ball rolls down a hill and...Problem 126DQ:
An ice sailcraft is stalled on a frozen lake on a windless day. The skipper sets up a fan as shown...Problem 127DQ:
Will your answer to Question 126 be different if the air is brought to a halt by the sail without...Problem 128DQ:
Discuss the advisability of simply removing the sail in the situation discussed in Questions 126 and...Problem 129DQ:
Suppose that three astronauts outside a spaceship decide to play catch. All three equally Strong...Problem 130DQ:
Discuss whether something can have energy without having momentum. Discuss whether something can...Problem 131DQ:
Arrange the following four energy-transforming devices or processes in the correct order for...Problem 132DQ:
What are the roles of water, energy, hydrogen, and oxygen in (a) electrolysis, (b) operation or a...Problem 133DQ:
Does a car burn more fuel when its lights are turned on? Does the overall consumption of fuel depend...Problem 134DQ:
This may seem like an easy question for a physics buff to answer: With what force does a 10-N rock...Problem 135DQ:
Your friend says that one way to improve air quality in a city is to synchronize traffic lights so...Problem 136DQ:
Does the electric power produced by wind-powered generators affect the speed of the wind? That is,...Problem 137DQ:
A red ball of mass m and a blue ball of mass 2m have the same kinetic energy. Explain which of the...Problem 138DQ:
No work is done by gravity on a bowling ball resting or moving on a bowling alley, because the force...Problem 139DQ:
Consider a bob attached by a stringa simple pendulumthat swings to and fro. (a) Why does the tension...Problem 140DQ:
Consider a satellite in a circular orbit above Earth's surface. In Chapter 4 we will learn that the...Problem 1RAT:
A freight train rolls along a track with considerable momentum, If it then rolls at the same speed...Problem 2RAT:
In the absence of external forces, momentum is conserved in (a) an elastic collision. (b) an...Problem 3RAT:
If the running speed of Fast Freda doubles, what also doubles is her (a) momentum. (b) kinetic...Problem 4RAT:
Which of the following equations best illustrate s the usefulness of automobile airbags? (a) F = ma...Problem 5RAT:
Which of the following equations is most useful for solving a problem that asks for the distance...Problem 6RAT:
How much work is done on a 200-kg crate that is hoisted 2 m in a time of 4 s? (a) 400J (b) 1000J (c)...Problem 7RAT:
A circus diver drops from a high pole into water far below. When he is halfway down, (a) his...Problem 8RAT:
A bicycle that travels twice as fast as another when braking to a stop will skid (a) twice as far....Browse All Chapters of This Textbook
Chapter 1 - Patterns Of Motion And EquilibriumChapter 2 - Newton's Laws Of MotionChapter 3 - Momentum And EnergyChapter 4 - Gravity, Projectiles, And SatellitesChapter 5 - Fluid MechanicsChapter 6 - Thermal Energy And ThermodynamicsChapter 7 - Heat Transfer And Change Of PhaseChapter 8 - Static And Current ElectricityChapter 9 - Magnetism And Electromagnetic InductionChapter 10 - Waves And Sound
Chapter 11 - LightChapter 12 - Atoms And The Periodic TableChapter 13 - The Atomic Nucleus And RadioactivityChapter 14 - Elememts Of ChemistryChapter 15 - How Atoms Bond And Molecules AttractChapter 16 - MixturesChapter 17 - How Chemicals ReactChapter 18 - Two Classes Of Chemical ReactionsChapter 19 - Organic CompoundsChapter 20 - Rocks And MineralsChapter 21 - Plate Tectonics And Earth's InteriorChapter 22 - Shaping Earth's SurfaceChapter 23 - Geologic Time - Reading The Rock RecordChapter 24 - The Oceans, Atmosphere, And Climatic EffectsChapter 25 - Driving Forces Of WeatherChapter 26 - The Solar SystemChapter 27 - Stars And GalaxiesChapter 28 - The Structure Of Space And Time
Sample Solutions for this Textbook
We offer sample solutions for EP CONCEPTUAL PHYSICAL SCI.-MOD.MASTER. homework problems. See examples below:
Chapter 1, Problem 1RCQChapter 2, Problem 1RCQChapter 3, Problem 1RCQChapter 4, Problem 1RCQChapter 5, Problem 1RCQChapter 6, Problem 1RCQChapter 7, Problem 1RCQChapter 8, Problem 1RCQChapter 9, Problem 1RCQ
Chapter 10, Problem 1RCQChapter 11, Problem 1RCQExplanation: The oldest element is a parent of other element, which is in oldest stars. The heaver...Explanation: The Beta Particle is an electron twisted away on or after a minute core for the period...Explanation: Chemistry: Chemistry is a branch of science which deals with the composition of...Chapter 15, Problem 1RCQExplanation: Mixtures: It is generally defined as the substance that consists of two or more...Explanation: Coefficient is the numbers, placed in front of the reactant or product to show the...Chapter 18, Problem 12RCQChapter 19, Problem 1RCQChapter 20, Problem 1RCQChapter 21, Problem 1RCQChapter 22, Problem 1RCQExplanation: The relative dating is the science of determining the relative order of the past events...Chapter 24, Problem 1RCQChapter 25, Problem 1RCQChapter 26, Problem 1RCQChapter 27, Problem 1RCQChapter 28, Problem 1RCQ
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