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The magnifying power of an astronomical telescope in the normal adjustment poition is 20.If the lenght of the telescope is 105 cm in this adjustment, Find the focal lengths of the 2 lences.
A hollow, conducting spherical shell, of radius 3.50 cm, has charge ?9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere, What is the direction of the field
What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 76.0 rev/min in 3.50 s.
A crane is required to pull up a load of building supplies from the ground to a height of 90 m at a constant velocity. Find the power output required of the motor that pulls the cable up
A hill sled moves from the top of a hill at 1m/s. What is the speed of the sled at the bottom of the hill? How high is it from the ground when it is moving at 5m/s
a projectile is fired at angle of theta from the horizontal with an initial velocity of vo. the projectile strikes the
Explain the relationship between the tilt of the Earth’s axis and the fact that we have seasons and the seasonal variation in the length of the day. What would happen to the seasons and the day length of the 23.5° tilt were reduced to 0°?
A disk of radius R has a hole in the center of radius a (like an audio compact disk). If the disk holds a uniform surface charge ?, determine the expression for the electric field at a point P that lies along the central perpendicular axis of the dis..
Runner A is initially 8.0 mi west of a flagpole and is running with a constant velocity of 6.0 mi/h due east. How far are the runners from the flagpole
Archer fish often prey for flies that hover above the water. The index of refraction of water is 1.33. what would be a "safe" horizontal seperation for the fly
two semicircular filament have a common diameter. one lies in the x-y plane and one in the x-z plane. the curved portion of each carries a uniform line charge density (rho). find the electric filed at the common cetner of the semicircles
Maddox takes off on his jet ski so they have a combined mass of 319.86kg. The skis have a thrust of 982.13N, What is Maddox's top speed
An 845-N sled is pulled a distance of 173 m. The task requires 1.20 x 10^4 J of work and is done by pulling on a rope with the force of 142 N. At what angle is the rope held.
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