Consider the following.
(a) About how many microorganisms are found in the human intestinaltract? (A human intestinal tract has a length of about 7 m andaverage diameter of 4 cm. A typical bacterial length scale is 10-6m. Estimate the intestinal volume and assume one hundredth of it isoccupied by bacteria.)
A train is traveling down a straight track at 35 m/s when theengineer applies the brakes, resulting in an acceleration of -1.0m/s2 as long as the train is in motion. How far does the train moveduring a 22 s time interval starting at the instant the brakes areapplied?
A bullet is fired through a board 11.0 cm thick in such a way thatthe bullet's line of motion is perpendicular to the face of theboard. The initial speed of the bullet is 400 m/s and it emergesfrom the other side of the board with a speed of 300 m/s.
(a) Find the acceleration of the bullet as it passes through theboard.
m/s2
(b) Find the total time the bullet is in contact with theboard.
s
Consider the following.
(a) About how many microorganisms are found in the human intestinaltract? (A human intestinal tract has a length of about 7 m andaverage diameter of 4 cm. A typical bacterial length scale is 10-6m. Estimate the intestinal volume and assume one hundredth of it isoccupied by bacteria.)
A train is traveling down a straight track at 35 m/s when theengineer applies the brakes, resulting in an acceleration of -1.0m/s2 as long as the train is in motion. How far does the train moveduring a 22 s time interval starting at the instant the brakes areapplied?
A bullet is fired through a board 11.0 cm thick in such a way thatthe bullet's line of motion is perpendicular to the face of theboard. The initial speed of the bullet is 400 m/s and it emergesfrom the other side of the board with a speed of 300 m/s.
(a) Find the acceleration of the bullet as it passes through theboard.
m/s2
(b) Find the total time the bullet is in contact with theboard.
s
