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Consider a spring whose natural length is 20 cm is compressed by 10 cm and placed between two masses M= 8.0 kg and m= 4.0 kg. the spring constant is 200N/m and coefficient of kinetic friction between the blocks and the floor is 0.15 . The blocks are released and the spring decompresses and falls to the floor. What is the distance between the blocks when they come to stop? Assume that the work done by the friction during the expansion of the spring is negligible.
If an object is placed between two parallel thin plane mirrors, an infinite number of images result. Find the distance of the images formed from the object
When a 111 dB sound wave comes through an open window of area 0.510 m2, how much acoustic energy passes through the window in a 10.3 min interval
Water enters a horizontal nozzle with diameters d1 and d2 at 10 m=s and exits to the atmosphere. Estimate the pressure upstream of the nozzle.
A .400 kg object isswinging in circular path and in a vertical plane on a .500 mlength string. what is the tension on the string when the object is at the bottom of the circle
a large storage tank open to the atmosphere at the top and filled with water develops a small hole in its side at a
A 0.10 kilogram balloon is filled with helium (density = 0.179 kg/m3). If the balloon is a sphere with a radius of 6.3 meter, compute what is the maximum weight it can lift
The earth's magnetic field, with a magnetic dipole moment of 8.5×1022A•m2, is generated by currents within the molten iron of the earth's outer core. What is the current in the current loop
Ultrasound is the name given to frequencies above the human range of hearing, which is about 20000 Hz. What frequency is required
A converging lens has a focal length of 6.0cm . A 1.1cm -high arrow is located 11cm from the lens with its lowest point (the tail) 4.5cm above the lens axis. Find the distance from the axis to the highest point (the head) of the arrow image
On a cello, the string with the largest linear density (1.56 *10-2 kg/m) is the C string. What is the wavelength of the wave on the string
You are on a roof that is 15 m high and you are launching balloons off at an angle of 30o above the horizon with a speed of 20 m/s. Determine the horizontal range of the balloons
You are holding a compass 3.50 m from a long straight electrical supply wire that is carrying a direct current perpendicularly to the local direction of the Earth's magnetic field. find the magnitude of the current carried by the wire
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