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Standing on a sidewalk, you hear a frequency of 560 Hz from a siren of an approaching ambulance. After the amblance passes, you hear a frequency of 480 Hz. Find the speed of the ambulance.
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Question: In a science museum, a 110kg brass pendulum bob swings at the end of a 15-meter-long wire. The pendulum is started at exactly 8:00 a.m. every morning by pulling it to 1.5m the side and releasing it. Because of ...
Question: A proton accelerates from rest in a uniform electric field of 610 N/C. At some later time, its speed is 1.4 106 m/s. (a) Find the magnitude of the acceleration of the proton. m/s2 (b) How long does it take the ...
A bullet is shot straight up into air from ground. It reaches maximum height = 757m. Calculate initial speed of bullet in m/s & using the results calculate total flight time t in seconds until the bullet reached the grou ...
A ball with a mass of 1.5 kg is observed to move with an acceleration of 6 m/s2. What is the size of the net force acting on the ball? A 2.5-kg block being pulled across a table by a horizontal force of 80 N also experie ...
Question: A sled of mass m is being pulled horizontally by a constant upward force of magnitude F that makes an angle theta with the direction of motion. The coefficient of kinetic friction is mu_k. The average velocity ...
Quesiton: A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v . Assume that the magnitude of the acceleration due to gravity is g . - What is the wo ...
How are chemical and physical changes different. What are some demonstrations that you might do to help your students differentiate between a chemical and physical change?
Question 1: Rob was supposed to spend his two-week school work experience at his local auto-repair shop. Unfortunately, his time on the job only lasted two days. On day two, Rob was asked to get the 1-liter air tool oil ...
Question: A rifle with a barrel length of 57 cm fires a 11 g bullet with a horizontal speed of 370 m/s . The bullet strikes a block of wood and penetrates to a depth of 12 cm . 1- What resistive force (assumed to be cons ...
Propane boilers are a common technology for domestic heating, and have a typical energy efficiency of 90%. The chemical formula of propane is C 3 H 8 , its lower heating value is 50,400 kJ/kg, and its carbon content by m ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
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