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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 10-12g. 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 the same direction. Answer the following questions about E. coli using SI units (unless specifically requested otherwise) and correct significant figures.
What is its mass?
What is the length of its DNA, in millimeters?
Let's say you light your basement continuously with a 100 W ordinary incandescent light that has an effectiveness of 10 lumens/W. How much energy is added to your basement in a 24 hour period
An aircraft weighing 849?N is accelerated?at 7?m/s2 for?13 seconds, at which time the aircraft launches.? How much work was done on the aircraft
A fly appears to be upside down and three times its actual size when viewed during a converging lens with a focal length of 5.1 cm. How far is the fly from the lens?
Engineers redesign a car's wheels with the goal of decreasing eachwheel's angular momentum by 30% for a given linear speed for the car. Other design considerations require that the wheel diameter gofrom 38 {\rm cm} to 36 cm.If the old wheel had a ..
What is the greatest average speed of blood flow at 37°C in an artery of radius 1.50 mm if the flow is to remain laminar? Take the density of blood to be 1025 kg/m3
a child loses his balloon which rises slowly into the sky. if the balloon is 16 cm in diameter when the child loses it
A convex lens of 10 cm focal length is placed in contact with a convex lens of 15 cm focal length. What is the focal length of the combination
Object A has a mass of 10.0 kg and is located at xA = 0.0 m on the x-axis. Object B has a mass of 15.0 kg, What is the center of mass of the collection masses
A football is kicked at ground level with a speed of 40 m/s at an angle of 32.0 degrees to the horizontal. How much later does it hit the ground
a ray of light incident upon a mirror makes an angle of 33.9° with the mirror. What is the angle between the incident ray and the reflected ray
A circular surface with a radius of 0.059m is exposed to a uniform external electric field of magnitude1.58*104 N/C. The electric flux through thesurface is 80 N · m2/C. What is the angle between the direction of the electric field andthe normal to t..
A ball is thrown at a speed of 20m/s at an angle of 30 degrees above the horizontal. What is the time of flight of the ball
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