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Q1. A ball in flight is recorded and analyzed using digital video analysis software. The analysis produced the result that the ball had a horizontal speed of 0.60 m/s. In the analysis, a stick was used as a calibration standard, and it was believed that the stick was 1.0 m long. Though, after the analysis was done, it was discovered that the stick was actually 0.90 m long.
Was the horizontal speed actually faster or slower than analysis result?
What should the result have been for horizontal speed (Vx)?
Q2. A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.
What is the frequency heard by the observer? Imagine the speed of sound in air to be 340 m/s.
A particular organ pipe can resonate at 231 Hz, 385 Hz, and 539 Hz, but not at any other frequencies in between. Is it an open or a closed pipe? What is the fundamental frequency of this pipe.
What was the absorbed dose in the carbon walls? The average mass stopping powers of graphite and CO2 for the photons are, respectively, 1.648 and 1.680 MeV cm^2/g.
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What is magnitude of the change in the magnetic field
Use the binomial expansion to find an approximate expression
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A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed .
What is linear acceleration
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