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A woman stands between a vertical mirror 1/2 meter tall and a distant tree whose height is H. She is 1.0 meter from the mirror, and the tree is 15.0 meter from the mirror. If she sees the tree just fill the mirror, find how tall is the tree? [Hint: The tree is behind her, and rays from its top and bottom get to her eye.]
While a person is walking, his arms swing through approximately a 45.0^\circ angle in 0.520s. What is the acceleration of a 1.60 gram drop of blood in the fingertips at the bottom of the swing
John can hit a golf ball 310m on earth. on the moon's surface, g=1/6 gravity of earth, so how far could he hit the same ball if he could only achieve half an initial velocity achieved on earth.
A copper rod has a length of 1.6 meter and a cross-sectional area of4.8 x10-4 m2. What is the mass of ice per sec that melts
A three level laser has energy levels E 1=1.50 eV, E 2=3.50 eV, and E 3=5.50 eV. Level E 2 is the metastable state. What is the lasing wavelength
Monochromatic light falls on a slit that is 2.60*10-3 mm wide. If the angle between the first darkfringes on either side of the central maximum is 35.0degrees(dark fringe to dark fringe), what is the wavelength of the light used
Johnie wants to go sailing, but their is no wind. Johnie mounts an Industrial Fan on his sail boat with a 40 N force. What is the speed of the boat
A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 70.0 kg, determine the recoil speed of the person and the skateboard
One of two identical 500-Hz tuning forks is at rest and other is moving. These produce a beat frequency of 5 Hz. What are the possible velcities of the moving fork
A copper flask with a volume of 80 cm^3 is filled to the brim with olive oil. If the temp of the system is increased from 8C to 52C, how much oil spills
X-rays with initial wavelength 0.0665 nm undergo Compton scattering. At which scattering angle is this wavelength observed
you make five measurements of a particular wavelength and you find you have some random noise. your measurements are
A red laser from the physics lab is marked as producing 632.8-nm light. When light from this laser falls on two closely spaced slits, What is the wavelength of light produced by the pointer
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