You are playing a trombone and you want to play a much lower note than you are presently playing. What is one thing that you will have to do?
1.extend the slide
2.pull in the slide
3.leave the slide in the same position
4.Changing the pitch of the trombone has nothing to do with the slide position.
1
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Charge of uniform density 4.0 nC/m is distributed along the x axis from x = ?2.0 m to x = +3.0 m. What is the magnitude of the electric field at the point x = +5.0 m on the x axis?
a. 16 N/C b. 13 N/C c. 19 N/C d. 26 N/C e. 5.0 N/C
A 4.0-pC point charge is placed at the center of a hollow (inner radius = 2.0 cm, outer radius = 4.0 cm) conducting sphere which has a net charge of 4.0 pC. Determine the magnitude of the electric field at a point which is 6.0 cm from the point charge
a. 35 N/C b. 25 N/C c. 30 N/C d. 20 N/C e. 10 N/C
A marble rolls back and forth along the path shown. When it is at position B, its kinetic energy is
1) maximum, 2) minimum, 3) midway between maximum and minimum, its momentum is 4) maximum, 5) minimum, 6) midway between maximum and minimum, and its potential energy is 7) maximum. 8) minimum. 9) midway between maximum and minimum.
Fluid Flow: A pressurized cylindrical tank, 5.0 m in diameter, contains water that emerges from the pipe at point C with a speed of 84 m/s, as shown in the figure. Point A is 10 m above point B and point C is 3.0 m above point B. The area of the pipe at point B is 0.080 m2 and the pipe narrows to an area of 0.070 m2 at point C. Assume that the water is an ideal fluid in laminar flow. The density of water is 1000 kg/m3. The rate at which the water level is falling in the tank is closest to
A. 300 mm/s. B. 340 mm/s. C. 250 mm/s. D. 210 mm/s. E. 160 mm/s.