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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.]
Spark plugs should be tightened to a specified torque of 9.28Nm. You have a wrench that is 0.39 m long, What force must you exert on the wrench
If a roadway is banked at the proper angle, a car can round a corner without any assistance from friction between the tires and the road
A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.3. What is the magnification when the convex side is used as a mirror
a moving rod is observed to have a lenght of 2m and to be oriented at an angle of 30 degrees with respect to the direction of motion. what is the orentation angle in the proper frame
An 79 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2 shortly after opening the parachute. What upward force is exerted on the open parachute by the air
The density of iron is 7860 kg/m^3. What is the mass of an ironsphere whose diameter is 0.50m
A large steam pipe is covered with 1.7-cm-thick insulating material of thermal conductivity 0.31 J/(s m °C). How much energy is lost every second when the steam is at 185 °C
An object is shot at 56 m/s horizontally off the roof of a building which is 55 meters above the ground. How long does it take the object to reach the ground in seconds
Romeo (74.0 kilogram) entertains Juliet (58.0 kilogram) by playing his guitar from the rear of their boat at rest in still water, Obtain how far does the 81.0 kilogram boat move toward the shore it is facing
n 6 moles of a monatomic ideal gas initially fills a v0 0.35 m3 container at p0 85 kpa. the gas undergoes an
what is Spectroscopic and Photometric Parallaxes ? Define specific heat capacity and thermal capacity.
A base on Planet X fires a missile toward an oncoming space fighter. The missile's speed according to the base is 0.87 c, How fast is the space fighter traveling relative to Planet X
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