Concept explainers
The bacterium Escherichia coli (or E. coli) is a single-celled organism that lives in the gut of healthy humans and animals. Its body shape can be modeled as a 2-μm-long cylinder with a 1 μm diameter, and it has a mass of 1 x 10−12 Its chromosome consists of a single doublestranded chain of DNA 700 times longer than its body length. The bacterium moves at a constant speed of 20 μm/s, though not always in the same direction. Answer the following questions about E. coli using SI units (unless specifically requested otherwise) and correct significant figures.
- a. What is its length?
- b. Diameter?
- c. Mass?
- d. What is the length of its DNA, in millimeters?
- e. If the organism were to move along a straight path, how many meters would it travel in one day?
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
Modified Mastering Physics with Pearson eText -- Standalone Access Card -- for College Physics: A Strategic Approach (3rd Edition)
Additional Science Textbook Solutions
Tutorials in Introductory Physics
Lecture- Tutorials for Introductory Astronomy
University Physics Volume 2
University Physics Volume 1
Cosmic Perspective Fundamentals
Physics for Scientists and Engineers with Modern Physics
- A person walks 4 m to the park, then he walks 8200 km in the park then he returns back to home after grocery shopping and covers 720 cm, how much total distance that person covers in m?arrow_forwardHow many years will it take to occupy the computer's hard drive that can store data of 82 gigabytes if you used the keyboard to input data? Assume "standard" 8-hour working days, and that one byte is needed to input one keyboard character, and that you are capable to type 180 characters per minute.arrow_forwardA room has dimensions 2.58 m (height) x 4.29 mx 6.35 m. Afly starting at one corner flies around, ending up at the diagonally opposite corner. If the fly walks rather than flies, what is the length of the shortest path it can take?arrow_forward
- In SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you’re probably more comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical intuition. More precisely, show that (a) 1.0 m/s = 3.6 km/h and (b) 1.0 m/s = 2.2 mi/h.arrow_forwardIn SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you’re probably more comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical intuition. More precisely, show that (a) 1.0 m/s = 3.6 km/h and (b) 1.0 m/s = 2.2 mi/h. American football is played on a 100-yd-long field, excluding the end zones. How long is the field in meters? (Assume that 1 m = 3.281 ft.)arrow_forwardIf ϕ = 90° − θ, what is the value of sin2 ϕ + sin2 θ?arrow_forward
- The quantity p = 3.14159c is a number with no dimensions, since it is a ratio of two lengths. Describe two or three other geometrical or physical quantities that are dimensionless.arrow_forwardThe bacterium Escherichia coli (or E. coli) is a single-celled organism thatlives in the gut of healthy humans and animals. Its body shape can be modeled as a 2-μm-long cylinder with a 1 μm diameter, andit has a mass of 1 x 10-12 g. Its chromosome consists of a single double-stranded chain of DNA 700 times longer than its body length. The bacterium moves at a constant speed of 20 μm/s, though not always in thesame direction. Answer the following questions about E. coli using SI base units (unless specifically requested otherwise) and correct significant figures.a. What is its length?b. Diameter?c. Mass?d. What is the length of its DNA, in millimeters?e. If the organism were to move along a straight path, how many meters would it travel in one day?arrow_forwardHow many cubic centimeters are there in a cubic meter? a) 10 b) 100 c) 1000 d) 1 × 104 e) 1 × 106arrow_forward
- Problem 1 Perform the following unit conversions: a) 65 miles per hour to meters per second (hint: 1 mile = 1609 meters) b) 25 seconds to centuries c) 560 L to m3 (hint: 1 mL = 1 cm3) d) 2.5 g/cm3 to kg/m3arrow_forwardThe speed of light is now defined to be 2.997 924 58 * 10^8 m/s.(a) Express the speed of light to three significant figures. m/s (b) Express the speed of light to five significant figures. m/s(c) Express the speed of light to seven significant figures.m/sarrow_forwardThese conversion rates will be useful in the following question: 1.609 km 1 mile: 1 kg = 2.2lbs; 60 seconds = 1 minute. 60 minutes equals 1-hour. So 60 x 60, or 3600 seconds = 1-hour 1000g = 1 kg; 100 cm = 1 m; 100cm x 100cm = 1 m x 1 m, so that 10000 square centir In a similar way 1 cubic metre equals 100 cm x 100cm x 100cm. 1 million square centimetres = 1 cubic metre or 10° centimetres squared = 1 cubic metre (a) Convert 85 km per hour to metres per second. (b) Convert 10 m per second to kilometres per hour. (c) Convert 61 pence per centimetre into pounds per metre. (d) Convert a density of 6500 kg per cubic metre into grams per cubic centimetre. (e) Convert a particle's velocity of 2.70 metres per second into kilometres per hour. (f) Convert a particle's acceleration of 0.605 metres per seconds squared into kilometres per hours squared. Enter your answers in the boxes below. Input your answer exactly or to two decimal places if need be. (a) ______ (b)_____ (c)______ (d)______…arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning