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The compressor shown has a mass of 250 kg and operates at 2000 rpm. At this operating condition undesirable vibration occurs when the compressor is attached directly to the ground. To reduce the vibration of the concrete floor that is resting on clay soil, it is proposed to isolate the compressor by mounting it on a square concrete block separated from the rest of the floor as shown. The density of concrete is 2400 kg/m3 and the spring constant for the soil is found to be 80 3 106 N/m. The geometry of the compressor leads to choosing a block that is 1.5 m by 1.5 m. Determine the depth h that will reduce the force transmitted to the ground by 75%.
Sam wraps a string around the outside of a 0.040 m-radius 0.20 kg solid cylinder and utilizes it like a yo-yo. When released, the cylinder accelerates downwards at 2/3 g. Decide the rotational inertia of the solid cylinder.
A stone is thrown outward from the top of a 59.4m high cliff with an upward velocity component of 19.5 m/s. How long is the stone in the air
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8 ? 1011 solar masses. What should the orbital period of that star be
A steel cable has a cross-sectional area 3.44 × 10-3 m2 and is kept under a tension of 3.33 × 104 N. At what speed does a transverse wave move along the cable
A cube of metal has a mass of 0.569 kg and measures 3.09 cm on a side. Calculate the density and identify the metal
An astronaut is traveling in a space vehicle that has a speed of 0.485c relative to Earth. The astronaut measures his pulse rate at 77.5 per minute. What pulse rate does the Earth observer measure
A 0.400 kg soccer ball approaches a player horizontally with a speed of 11.0 m/s. What impulse was delivered to the ball by the player
The rms electric field of an electromagnetic wave increases from 320 to 960 N/C. (a) Determine the wave intensities for the two values of the electric field. (b) What is the rms magnetic field associated with each electric field? (c) Determine the wa..
What happened when the transverse waves reached your partner's end? Did the returning wave stay on the same side as the one you sent? Explain why you think this happens
A long solenoid of length 7.0 x 10^-2 meters and cross-sectional area of 4.0 x 10^-5 meters^2 contains 6200 turns per meter. Find the energy stored in the solenoid after 3 seconds
The near point of a naked eye is 25 cm. When placed at the near point and viewed by the naked eye, Find the focal length of the eyepiece
the distance between new york and los angeles is about 5000 km. a jet traveling at a speed of 815 kmhour leaves new
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