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Q. Two students are on a balcony 20.0 m above the street. One student throws a ball (ball 1) vertically downward at 12.7 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the balcony on the way down. What is the velocity of each ball as it strikes the ground?
Q. A pipe open at one end only has a fundamental frequency of 286 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Now, when both pipes vibrate at their fundamental frequencies, a beat frequency of 15 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 343 m/s.
A 5.0 multiplied by 102-newton girl takes 10. seconds to run up two flights of stairs to the landing, a total of 5.0 meters vertically above her starting point. What power does the girl develop during her run.
By what percent must one increase the tension in a guitar string to change speed of waves on the string from 327 m/s to 376 m/s.
A ball with a horizontal speed of 1.25m/s rolls off a bench 1.00m/s above the floor. how long does it take to reach the floor.How far from a point on the floor directly below the edge of the bench would the ball land.
The car accelerates uniformly to a speed of 2.05 m/s in 13.0 s and then continues at constant velocity.
Now, as both pipes vibrate at their fundamental frequencies, the beat frequency of 17 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 333 m/s.
A space traveller whose mass is 104kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no near planetary objects.
Compute dissimilarity in blood pressure
Two crewmen pull a boat through a lock. One crewman pulls with a force of F1 = 130 N at an angle of = 37° relative to the forward direction of the raft.
Two projectiles are thrown with the same initial speed, one at an angle with respect to the level ground and the other at angle 90 degree. Both projectiles strike the ground at the equivalent distance from the projection point. Are both projectiles i..
Vector has a magnitude of 7.20 units and makes an angle of 39.5° counter-clockwise from positive x-axis. Vector has a magnitude of 8.00 units and is directed along the negative x-axis.
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
Two radio antennas are separated by 2.00 m. Both broadcast identical 750MHz waves. If you walk around the antennas in a circle of radius 10.00 m, how many maxima will you detect.
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