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When an ambulance is stationary, the siren gives off a sound at a frequency of 500 Hz. In answering the following questions assume that the speed of the sound is 340 m/s. If the ambulance is stationary, what will be the speed of a driver moving toward the ambulance if the driver perceives a frequency of 523 Hz?
At rest a person has a metabolic rate of 4.2 x 10^5 J/hr. The person is submerged neck-deep into a tub containing 1.0 x 10^3 kg water at 27.00 degrees Celcius. what is the water's temperature after a half hour
Determine the angular acceleration of the pulleys and the tension T in the cord supporting the 612 Kg mass when it is released from rest.
An engine has a hot reservoir temperature of 900 K and a cold reservoir temperature of 608 K. What is the efficiency of the engine
The gas in a cylindrical container has a pressure of 1.0 multiply.gif 105 Pa and is at room temperature (293 K). What is the final temperature of the gas
What is momentum of the block
A telescope is designed using an objective lens f focal length f(obj)=2m and an eyepiece of focal length f(eye)=8cm. Find the location and size of the image of Jupiter formed by the objective lens
A simple RL circuit contains a 6.0-? resistor and an 18-H inductor. What is this circuit's time constant
A boat is to cross a river on a course directed 20.0° north of east in 10 minutes from point A to point B. The distance from point A to point B is 815m. If the river flows at a speed of 3.0 km/hr, at what angle upstream must the boat be headed,..
Two small-sized objects are placed on a uniform 9.00 {\rm kg} plastic beam 3.00 {\rm m} long, Find the location of the center of mass of this system by setting x=0 at the right end of the beam
A common flashlight bulb is rated at 0.202 A and 3.82 V (the values of current and voltage under operating conditions, estimate the temperature of the tungsten filament when the bulb is turned on
At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 940 m/s2 What is the magnitude of the net force acting on the soccer ball at this instant
Two people carry a heavy electric motor by placing it on a light board 2.70m long. One person lifts at one end with a force of 380N, Where is its center of gravity located
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