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A tunnel leading straight through a hill makes tones at 135 Hz and 165 Hz especially loud due to standing waves. Knowing that these two tones are two harmonics apart, find the smallest length the tunnel could have. Also determine the harmonic number for these two tones
A 2kg box is released, from rest, at the top of a rough circular track of radius 10cm. calculate the work done by all resistive forces
The drawing shows a square, each side of which has a length of L = 0.25 m. Find the electric potential energy of a third charge
An inductor used in a dc power supply has an inductance of 12.0H and a resistance of 170 OMEGA . It carries a current of 0.300 A. What is the energy stored in the magnetic field
Your 70kg friend is standing on the outer edge of a merry go round with moment of inertia 695kg*m^2, what will be the new angular velocity
An object is placed farther from a converging lens than twice the lens' focal length. Draw a ray diagram to determine the nature of the image and describe it
An owl is chasing a squirrel and is using echolocation (the reflection of sound) to aid in the hunt. If the squirrel is 40.5 m from the owl, how long does it take sound to travel from the owl to the squirrel and then back to the owl? (Use 343m/s a..
A 6.70mW helium neon laser emits a visible laser beam with a wavelength of 636nm . How many photons are emitted per second
A small mailbag is released from a helicopter that is descending steadily at 2.12 m/s. How far is it below the helicopter
A 21.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 108.0°C has a diameter of d = 2.54508 cm, What is the mass of the sphere
A 30 kilogram child moving at 4 meters per second jumps onto a 50 kilogram sled that is initially at rest on a long, frictionless, horizontal sheet of ice determine the speed of the child sled system after the child jumps into the sled.
A planet orbits the sun with a period of 14 years? How far is the planet from the sun
The low temperature in a freezer is -20 C, and the discharge temperature is 35 C. What is the maximum theoretical coefficient of performance
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