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The volume control on a stereo amplifier is adjusted so the sound intensity level increases from 23 to 61 dB. What is the ratio of the final sound intensity to the original sound intensity?
consider a pulsar a collapsed star of extremely high density with a mass m equal to that of the sun 1.98 times 1030 kg
The dipole moment of the water molecule (H2O) is 6.17 x 10-30 C.m. Consider a water molecule located at the origin whose dipole moment p points in the +x-direction. What is the direction of the electric force
A spaceship with rest mass m0 is traveling with an x-velocity V0x=+4/5 in the frame of the earth. what is the energy of the photon torpedo in the frame of earth
A block is attached to a chord passing over a pulley through a hole in a horizontal frictionless surface. what is the new angular velocity
Interpreting attenuation as a reflection loss calculate the lower limit to the effective reflectivity at the core cladding boundary
Identify three examples of 19th century Impressionist painting or sculpture and three Post-Impressionist works. Explain how the six pieces of art fall into these two styles.
Mary is driving her car at 48 km/h. She approaches an intersection just as the traffic light turns yellow. The yellow light lasts only 3.0 s before turning to red, and she is 30 m away from the near side of the intersection.
A circular bird feeder 20 cm in radius has rotational inertia 0.12kg*m^2 . The feeder is suspended by a thin wire and is spinning slowly at 5.4 rpm. What is the rotation rate after the bird lands
A magnetic field is oriented at an angle of 39o to the normal of a rectangular area 6.5cm by 6.0cm .If the magnetic flux through this surface. What is the strength of the magnetic field.
An electron, initially at rest, is accelerated through a potential difference of 550 Volt. Evaluate the speed of the electron due to this potential difference
In a police ballistics test, a 2.00-g bullet suddenly hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.60-m long string. This causes the block to swing through an arc of 5.50°. What was the speed of the bullet just b..
A prosthetic leg has a mass of 3 kg and a center of mass of 20 cm from the knee joint. What is the moment of inertia about the knee joint
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