Physical Universe
16th Edition
ISBN: 9780077862619
Author: KRAUSKOPF, Konrad B. (konrad Bates), Beiser, Arthur
Publisher: Mcgraw-hill Education,
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Chapter 3, Problem 36E
To determine
The force exerts by the Jaw on the nut.
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Chapter 3 Solutions
Physical Universe
Ch. 3 - Which of the following is not a unit of work? a....Ch. 3 - An object at rest may have a. velocity b. momentum...Ch. 3 - A moving object must have which one or more of the...Ch. 3 - When the momentum of a moving object is increased,...Ch. 3 - The total amount of energy (including the rest...Ch. 3 - When the speed of a moving object is halved, a....Ch. 3 - Two balls, one of mass 5 kg and the other of mass...Ch. 3 - A bomb dropped from an airplane explodes in...Ch. 3 - The operation of a rocket is based upon a. pushing...Ch. 3 - A spinning skater whose arms are at her sides then...
Ch. 3 - Prob. 11MCCh. 3 - The formula 12 mv2 for kinetic energy a. is the...Ch. 3 - A spacecraft has left the earth and is moving...Ch. 3 - The upper limit to the speed of an object with...Ch. 3 - It is not true that a. light is affected by...Ch. 3 - Albert Einstein did not discover that a. the...Ch. 3 - The work done in holding a 50-kg object at a...Ch. 3 - The work done in lifting 30 kg of bricks to a...Ch. 3 - A total of 4900 J is used to lift a 50-kg mass....Ch. 3 - The work a 300-W electric grinder can do in 5.0...Ch. 3 - A 150-kg yak has an average power output of 120 W....Ch. 3 - A 40-kg boy runs up a flight of stairs 4 m high in...Ch. 3 - Car A has a mass of 1000 kg and is moving at 60...Ch. 3 - A 1-kg object has a potential energy of 1 J...Ch. 3 - A 1-kg object has kinetic energy of 1 J when its...Ch. 3 - The 2-kg blade of an ax is moving at 60 m/s when...Ch. 3 - The highest MA that can be obtained by a system of...Ch. 3 - A machine has a MA of 6.0. The work input needed...Ch. 3 - A person uses a force of 300 N to pry up one end...Ch. 3 - A 1-kg ball is thrown in the air. When it is 10 m...Ch. 3 - A 10,000-kg freight car moving at 2 m/s collides...Ch. 3 - A 30-kg girl and a 25-kg boy are standing on...Ch. 3 - An object has a rest energy of 1 J when its mass...Ch. 3 - The smallest part of the total energy of the ball...Ch. 3 - The lightest particle in an atom is an electron,...Ch. 3 - A person holds a 10-kg package 1.2 m above the...Ch. 3 - Under what circumstances (if any) is no work done...Ch. 3 - The sun exerts a gravitational force of 4.0 1028...Ch. 3 - A crate is pushed across a horizontal floor at...Ch. 3 - A total of 490 J of work is needed to lift a body...Ch. 3 - A woman eats a cupcake and proposes to work off...Ch. 3 - The acceleration of gravity on the surface of Mars...Ch. 3 - The kilowatt-hour is a unit of what physical...Ch. 3 - The motor of a boat develops 60 kW when the boats...Ch. 3 - How much power must the legs of a 70-kg man...Ch. 3 - A weightlifter raises a 70-kg barbell from the...Ch. 3 - An escalator 14 m long is carrying a 70-kg person...Ch. 3 - A 700-kg horse whose power output is 1.0 hp is...Ch. 3 - A persons metabolic processes can usually operate...Ch. 3 - A crane whose motor has a power input of 5.0 kW...Ch. 3 - A total of 104 kg of water per second flows over a...Ch. 3 - Which of these energies might correspond to the KE...Ch. 3 - What is the speed of an 800-kg car whose KE is 250...Ch. 3 - A moving object whose initial KE is 10 J is...Ch. 3 - Is the work needed to bring a cars speed from 0 to...Ch. 3 - A 1-kg salmon is hooked by a fisherman and it...Ch. 3 - Prob. 22ECh. 3 - How long will it take a 1000-kg car with a power...Ch. 3 - Does every moving body possess kinetic energy?...Ch. 3 - As we will learn in Chap. 6, electric charges of...Ch. 3 - A 60-kg woman jumps off a wall 80 cm high and...Ch. 3 - Why does a nail become hot when it is hammered...Ch. 3 - A 3-kg stone is dropped from a height of 100 m....Ch. 3 - Prob. 29ECh. 3 - Prob. 30ECh. 3 - A ball is dropped from a height of 1 m and loses...Ch. 3 - A person sitting under a coconut palm is struck by...Ch. 3 - A skier is sliding downhill at 8 m/s when she...Ch. 3 - A force of 10 N is used to lift a 600-g ball from...Ch. 3 - A person uses a force of 49 N to raise a 30-kg...Ch. 3 - Prob. 36ECh. 3 - The human forearm is a class III lever. Find the...Ch. 3 - A ramp 20 m long slopes down 1.2 m to the edge of...Ch. 3 - In an effort to lose weight, a person runs 5 km...Ch. 3 - An 80-kg crate is raised 2 m from the ground by a...Ch. 3 - An 800-kg car coasts down a hill 40 m high with...Ch. 3 - (a) When an object at rest explodes into two parts...Ch. 3 - A golf ball and a Ping-Pong ball are dropped in a...Ch. 3 - Is it possible for an object to have more kinetic...Ch. 3 - What happens to the momentum of a car when it...Ch. 3 - The speed of an airplane doubles in flight. (a)...Ch. 3 - When the kinetic energy of an object is doubled,...Ch. 3 - What, if anything, happens to the speed of a...Ch. 3 - A ball of mass m rolling on a smooth surface...Ch. 3 - A railway car is at rest on a frictionless track....Ch. 3 - An empty dump truck coasts freely with its engine...Ch. 3 - A boy throws a 4-kg pumpkin at 8 m/s to a 40-kg...Ch. 3 - A 30-kg girl who is running at 3 m/s jumps on a...Ch. 3 - A 70-kg man and a 50-kg woman are in a 60-kg boat...Ch. 3 - The 176-g head of a golf club is moving at 45 m/s...Ch. 3 - A 40-kg skater moving at 4 m/s overtakes a 60-kg...Ch. 3 - The two skaters of Exercise 56 are moving in...Ch. 3 - A 1000-kg car moving east at 80 km/h collides...Ch. 3 - As the polar ice caps melt, the length of the day...Ch. 3 - All helicopters have two rotors. Some have both...Ch. 3 - The earthquake that caused the Indian Ocean...Ch. 3 - What are the two postulates from which Einstein...Ch. 3 - The theory of relativity predicts a variety of...Ch. 3 - What physical quantity will all observers always...Ch. 3 - The length of a rod is measured by several...Ch. 3 - Under what circumstances does it become...Ch. 3 - Why is it impossible for an object to move faster...Ch. 3 - The potential energy of a golf ball in a hole is...Ch. 3 - What is the effect on the law of conservation of...Ch. 3 - A certain walking person uses energy at an average...Ch. 3 - One kilogram of water at 0C contains 335 kJ of...Ch. 3 - When 1 g of gasoline is burned in an engine, about...Ch. 3 - Approximately 5.4 106 J of chemical energy is...Ch. 3 - Approximately 4 109 kg of matter is converted...
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- 2. In class, we discussed several different flow scenarios for which we can make enough assumptions to simplify the Navier-Stokes equations enough to solve them and obtain an exact solution. Consulting the cylindrical form of the Navier-Stokes equations copied below, please answer the following questions. др a 1 a + +0x- + +O₂ = Pgr + μl 18²v, 2 ave ²v₁] az2 + at or r de r Əz dr ar Vodvz др [18 + + +Or + +Vz = Pgz +fl at ar r 20 ôz ôz dr ave дов V,Ve ave +Or + + = pge at dr r 80 Əz + az2 a.) In class, we discussed how the Navier-Stokes equations are an embodiment of Newton's 2nd law, F = ma (where bolded terms are vectors). Name the 3 forces that we are considering in our analysis of fluid flow for this class. др a 10 1 ve 2 av 2200] + +μ or 42 30 b.) If we make the assumption that flow is "fully developed" in the z direction, which term(s) would go to zero? Write the term below, describe what the term means in simple language (i.e. do not simply state "it is the derivative of a with…arrow_forward1. Consult the form of the x-direction Navier-Stokes equation below that we discussed in class. (For this problem, only the x direction equation is shown for simplicity). Note that the equation provided is for a Cartesian coordinate system. In the spaces below, indicate which of the following assumptions would allow you to eliminate a term from the equation. If one of the assumptions provided would not allow you to eliminate a particular term, write "none" in the space provided. du ди at ( + + + 매일) du ди = - Pgx dy др dx ²u Fu u + fl + ax2 ay² az2 - дх - Əz 1 2 3 4 5 6 7 8 9 Assumption Flow is in the horizontal direction (e.g. patient lying on hospital bed) Flow is unidirectional in the x-direction Steady flow We consider the flow to be between two flat, infinitely wide plates There is no pressure gradient Flow is axisymmetric Term(s) in equationarrow_forwardDon't use ai to answer I will report you answerarrow_forward
- why did the expert subtract the force exerted by the hand and the elbow by the force due to the weight of the hand and forearm and force exerted by the tricep. Does the order matter and how do you determine what to put first. Question 4 AP, CHAPTER 13 FROM BASIC BIOMECHANICS 8TH EDITIONarrow_forwardThe drawing illustrates the dispersion of light by a prism. The prism is made from a certain type of glass, and has a cross section shaped like an equilateral triangle. The indices of refraction for the red and violet light in this type of glass are 1.649 and 1.694, respectively. The angle of incidence for both the red and violet light is 60.0°. Find the angles of refraction at which the (a) red and (b) violet rays emerge into the air from the prism. Glass prism Incident light Normal (a) Normal Incident light Red (660 nm) (b) Violet (410 nm)arrow_forwardDon't use ai to answer I will report you answerarrow_forward
- A glass block (n = 1.56) is immersed in a liquid. A ray of light within the glass hits a glass- liquid surface at a 70.0° angle of incidence. Some of the light enters the liquid. What is the smallest possible refractive index for the liquid?arrow_forwardThe drawing shows a crystalline slab (refractive index 1.995) with a rectangular cross section. A ray of light strikes the slab at an incident angle of 01 = 35.0°, enters the slab, and travels to point P. This slab is surrounded by a fluid with a refractive index n. What is the maximum value of n such that total internal reflection occurs at point P? Ме Buarrow_forwardWhat is the amount of M112 needed to breach a 5-foot thick dense concrete wall utilizing an internal charge placed in the center of the target?arrow_forward
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