A pump uses a piston of 15 cm diameter that moves at 2.0 cm/s as it pushes a fluid through a pipe. What is the speed of the fluid when it enters a portion of the pipe that is 3.0 mm in diameter? Treat the fluid as ideal and incompressible
A) 50 m/s
B) 50 cm/s
C) 6.0 cm/s
D) 22 cm/s
A
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Which statement gives the relationship between the waves in the electric and magnetic fields in an electromagnetic wave?
A) They are in phase and parallel with each other in space. B) They are 90 degrees out of phase but parallel in space. C) They are in phase but perpendicular to each other in space. D) They are 180 degrees out of phase and random in their inclinations to each other. E) They are in phase but opposite in direction of motion.
The amount of mass lost in a star's solar wind is generally greatest during its main sequence lifetime
a. True b. False Indicate whether the statement is true or false
Venus is located
A) near the outer boundary of the Sun's habitable zone B) in the middle of the Sun's habitable zone C) near the inner boundary of the Sun's habitable zone D) outside the Sun's habitable zone
A point charge (?5.0 ?C) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 ?C) is placed on the x axis at x = ?4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 ?C) placed on the y axis at y = 3.0 cm?
a. 90 N b. 45 N c. 54 N d. 72 N e. 36 N