University Physics Volume 1 18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: William Moebs, Samuel J. Ling, Jeff Sanny
1 Units And Measurement 2 Vectors 3 Motion Along A Straight Line 4 Motion In Two And Three Dimensions 5 Newton's Law Of Motion 6 Applications Of Newton's Laws 7 Work And Kinetic Energy 8 Potential Energy And Conservation Of Energy 9 Linear Momentum And Collisions 10 Fixed-axis Rotation 11 Angular Momentum 12 Static Equilibrium And Elasticity 13 Gravitation 14 Fluid Mechanics 15 Oscillations 16 Waves 17 Sound Chapter1: Units And Measurement
Chapter Questions Section: Chapter Questions
Problem 1.1CYU: Check Your Understanding Restate 4.79105kg using a metric prefix such that the resulting number is... Problem 1.2CYU: Check Your Understanding Light navels about 9 Pm in a year. Given that a year is about 3107s , what... Problem 1.3CYU: Check Your Understanding We know horn Figure 1.4 that the diameter of Earth is on the order of 107m... Problem 1.4CYU: Check Your Understanding Given that 1 lb (pound) is 4.45 N. were the numbers being output by... Problem 1.5CYU: Check Your Understanding Suppose we want the formula for the volume of a sphere. The two expressions... Problem 1.6CYU: Check Your Understanding Is the equation v=atdimensionally consistent? One further point thin needs... Problem 1.7CYU: Check Your Understanding Figure 1.4 says the mass of the atmosphere is 1019kg . Assuming the density... Problem 1.8CYU: Check Your Understanding A high school track coach has just purchased a new stopwatch. The stopwatch... Problem 1CQ: The Scope and Scale of Physics What is physics? Problem 2CQ: The Scope and Scale of Physics Some have described physics as a “search for simplicity.” Explain why... Problem 3CQ: The Scope and Scale of Physics If two different theories describe experimental observations equally... Problem 4CQ: The Scope and Scale of Physics What determines the validity of a theory? Problem 5CQ: The Scope and Scale of Physics Certain criteria must be satisfied if a measurement or observation is... Problem 6CQ: The Scope and Scale of Physics Can the validity of a model be limited or must it be universally... Problem 7CQ: Units and Standards Identify some advantages of metric units. Problem 8CQ: Units and Standards What are the SI base units of length, mass, and time? Problem 9CQ: Units and Standards What is the difference between a base unit and a derived unit? (b) What is the... Problem 10CQ: For each of the following scenarios, refer to Figure 1.4 and Table 1.2 to determine which metric... Problem 11CQ: Significant Figures (a) What is the relationship between the precision and the uncertainty of a... Problem 12CQ: Solving Problems in Physics What information do you need to choose which equation or equations to... Problem 13CQ: Solving Problems in Physics What should you do after obtaining a numerical answer when solving a... Problem 14P: The Scope and Scale of Physics Find the order of magnitude of the following physical quantities. (a)... Problem 15P: Use the orders of magnitude you found in the previous problem to answer the following questions to... Problem 16P: Roughly how many heartbeats are there in a lifetime? Problem 17P: A generation is about one-third of a lifetime. Approximately how many generations have passed since... Problem 18P: Roughly how many times longer than the mean life of an extremely unstable atomic nucleus is the... Problem 19P: Calculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the... Problem 20P: (a) Calculate the number of cells in a hummingbird assuming the mass of an average cell is 10 times... Problem 21P: Assuming one nerve impulse must end before another can begin, what is the maximum firing rate of a... Problem 22P: About how many floating-point operations can a supercomputer perform each year? Problem 23P: Roughly how many floating-point operations can a supercomputer perform in a human lifetime? Problem 24P: The following times are given using metric prefixes on the base SI unit of time: the second. Rewrite... Problem 25P: The following times are given in seconds. Use metric prefixes to rewrite them so the numerical value... Problem 26P: The following lengths are given using metric prefixes on the base SI unit of length: the meter.... Problem 27P: The following lengths are given in meters. Use metric prefixes to rewrite them so the numerical... Problem 28P: The following masses are written using metric prefixes on the gram. Rewrite them in scientific... Problem 29P: The following masses are given in kilograms. Use metric prefixes on the gram to rewrite them so the... Problem 30P: The volume of Earth is on the order of 1021m3 . (a) What is this in cubic kilometers (km3) ? (b)... Problem 31P: The speed limit on some interstate highways is roughly 100 km/h. (a) What is this in meters per... Problem 32P: A car is traveling at a speed of 33 m/s. (a) What is its speed in kilometers per hour? (b) Is it... Problem 33P: In SI units, speeds are measured in meters per second (m/s). But, depending on where you live,... Problem 34P: American football is played on a 100-yd-long field, excluding the end zones. How long is the field... Problem 35P: Soccer fields vary in size. A large soccer field is 115 m long and 85.0 m wide. What is its area in... Problem 36P: What is the height in meters of a person who is 6ft 1.0 in. tall? Problem 37P: Mount Everest, at 29,028ft , is the tallest mountain on Earth. What is its height in kilometers?... Problem 38P: The speed of sound is measured to be 342 m/s on a certain day. What is this measurement in... Problem 39P: Tectonic plates are large segments of Earth’s mist that move slowly. Suppose one such plate has an... Problem 40P: The average distance between Earth and the Sun is 1.51011m . (a) Calculate the average speed of... Problem 41P: The density of nuclear matter is about 1018kg/m3 . Given that 1 mL is equal in volume to cm3 , what... Problem 42P: The density of aluminum Is 2.7g/cm3 . What is the density in kilograms per cubic meter? Problem 43P: A commonly used turn of mass in the English system Is the pound-mass, abbreviated Ibm, where 1 Ibm =... Problem 44P: A furlong is 220 yd. A fortnight is 2 weeks. Convert a speed of one furlong per fortnight to... Problem 45P: It takes 2 radians (rad) to get around a circle, which Is the same as 360 . How many radians are in... Problem 46P: Light travels a distance of about 3108m/s . A light-minute is the distance light travels in 1 mm. If... Problem 47P: A light-nanosecond is the distance light travels in 1 ns. Convert 1 ft to light-nanoseconds. Problem 48P: An electron has a mass of 9.1110-31kg . A proton has a mass of 1.6710-27kg . What is the mass of a... Problem 49P: A fluid ounce is about 30mL. What is the voIume of a 12 fl-oz can of soda pop in cubic meters? Problem 50P: A student is trying to remember some formulas from geometry. In what follows, assume Ais area, Vis... Problem 51P: Consider the physical quantities s,v,a, and t with dimensions [s]=L,[v]=LT1,[a]=LT2 and [t]=L .... Problem 52P: Consider the physical quantities m,s,v,a, and t with dimensions [m]=M,[s]=L,[v]=LT1 and [a]=LT2 .... Problem 53P: Suppose quantity s is a length and quantity t is a time. Suppose the quantities vand a are defined... Problem 54P: Suppose [V]=L3,[]=ML3, and [t]=T . (a) What is the dimension of dV? (b) What is the dimension of... Problem 55P: The arc length formula says the length sof arc subtended by angle in a circle of radius r is given... Problem 56P: Estimates and Fermi Calculations Assuming the human body is made primarily of water, estimate the... Problem 57P: Assuming the human body is primarily made of water, estimate the number of molecules in it. (Note... Problem 58P: Estimate the mass of air in a classroom. Problem 59P: Estimate the number of molecules that make up Earth, assuming an average molecular mass of 30 g/mol.... Problem 60P: Estimate the surface area of a person. Problem 61P: Roughly how many solar systems would it take to tile the disk of the Milky Way? Problem 62P: (a) Estimate the density of the Moon. (b) Estimate the diameter of the Moon. (c) Given that the Moon... Problem 63P: The average density of the Sun is on the order 103kg/m3 . (a) Estimate the diameter of the Sun. (b)... Problem 64P: Estimate the mass of a virus. Problem 65P: A floating-point operation is a single arithmetic operation such as addition, subtraction,... Problem 66P: Consider the equation 4000/400=10.0 . Assuming the number of significant figures in the answer is... Problem 67P: Suppose your bathroom scale reads your mass as 65 kg with a 3% uncertainty. What is the uncertainty... Problem 68P: A good-quality measuring tape can be off by 0.50cm over a distance of 20m . What is its percent... Problem 69P: An infant’s pulse rate is measured to be 1305 beats/mm. What is the percent uncertainty in this... Problem 70P: (a) Suppose that a person has an average heart rate of 72.0 beats/mm. How many beats does he or she... Problem 71P: A can contains 375 mL of soda. How much is left after 308 mL is removed? Problem 72P: State how many significant figures are proper In the results of the following calculations: (a)... Problem 73P: (a) How many significant figures are in the numbers 99 and 100.? (b) If the uncertainty in each... Problem 74P: (a) If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h, what is the percent... Problem 75P: (a) A person’s blood pressure is measured to be 1202mmHg . What is its percent uncertainty? (b)... Problem 76P: A person measures his or her heart rate by counting the number of beats in 30s. If 401 beats are... Problem 77P: What is the area of a circle 3.102 cm in diameter? Problem 78P: Determine the number of significant figures in the following measurements: (a) 0.0009 , (b) 15,450.0... Problem 79P: Perform the following calculations and express your answer using the correct number of significant... Problem 80AP: Consider the equation y=mt+b, where the dimension of y is length and the dimension of t is time, and... Problem 81AP: Consider the equation s=s0+v0t+a0t2/2+j0t3/6+s0t4/24+ct5/120 , were s is a length and t is a time.... Problem 82AP: (a) A car speedometer has a 5% uncertainty. What is the range of possible speeds when it reads 90... Problem 83AP: A marathon runner completes a 42.188-km course in 2 h, 30 min, and 12s. There is an uncertainty of... Problem 84AP: The sides of a small rectangular box are measured to be 1.800.1cm,2.050.02cm, and 3.10.1cm long.... Problem 85AP: When nonmetric units we used in the United Kingdom, a unit of mass called the pound-mass (lbm) was... Problem 86AP: The length and width of a rectangular room are measured to be 3.9550.005m and 10500.005m . Calculate... Problem 87AP: A car engine moves a piston with a circular cross-section of 73000.002cm in diameter a distance of... Problem 88CP: The first atomic bomb was detonated on July 16, 1945, at the Trinity test site about 200 mi south of... Problem 89CP: The purpose of this problem is to show the entire concept of dimensional consistency can be... Problem 83AP: A marathon runner completes a 42.188-km course in 2 h, 30 min, and 12s. There is an uncertainty of...
Related questions
Deriving Angular Acceleration Equations
Transcribed Image Text: Degan with, and derive this equation.
Question 2: derive 0 = 1/2at? + wot + Oo-
Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .
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