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A telescope that has a 80 centimeter focal length objective and a 3.50 centimeter focal length eyepiece. Obtain the distance between the objective and eyepiece lenses in the telescope needed to produce a final image very far from the observer, where vision is most relaxed. Note that a telescope is normally used to view very distant objects.
A 48dB sound wave strikes an eardrum whose area is 4.2×10?5m^2. How much energy is absorbed by the eardrum per second
A ball is tied to an elastic string of length 8.0m and swung in a horizontal circle with a velocity if 0.8m/s. When a metallic object is tied to a rope of length 2.75m and swung in a horizontal circle, it makes 1 revolution in 2.9s.
A 3.0-g bullet traveling at 350 m/s hits a tree and slows down uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What was the force exerted on the bullet in bringing it to rest
A 1.42 103-kg car traveling initially with a speed of 20.0 m/s in an easterly direction crashes into the rear end of a 9.00 103-kg truck moving in the same direction at 14.0 m/s. What is the velocity of the truck right after the collision
Some GRIN material is made in the form of a doughnut. The inside diameter (the diameter of the hole in the doughnut) is 34 cm, What should be the highest, and the lowest refractive index of the material
A police car is moving at 37.1 m/s (83.0 mi/h) behind a speeding car that is going faster. How fast is the speeder going
A 5.00 g bullet moving at 624 m/s strikes a 720g wooden block at rest on a frictionless surface. What is the resulting speed of the block
Assuming normal temperature and pressure outside, and normal pressure inside, what must be the inside temperature (in Celsius) if the hot air balloon has diameter 17 meters and carries 446.3 kg load? (Except the mass of air inside, everything else is..
a uniform electric field aibj intersects a surface of area a. what is the flux through this area if the surface lies
A 2.70-cm-high object is situated 18.5 cm in front of a concave mirror that has a radius of curvature of 8.06 cm. Calculate the location and the height of the image
A heart defibrillator delivering 400 Joule of energy has a capacitance of 8.00 µF. Determine the voltage of the second defibrillator
a person looking out the window of a stationary train notices that raindrops are falling veritcally down at a speed of
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