Angular magnification of the telescope
Consider a refracting telescope. If it has an objective lens with fobj = 1.8 m and an eyepiece with feyepiece = 2.9 cm, what is the angular magnification of the telescope?
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We observe two charges separated by a distance of 1.00 meters. If the distance between the two charges is changed to be half what it was, by what factor would the electric force of between them be changed. That is, what is the ratio of the new for
What is the variation of pressure in the sound wave if the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?
High-speed stroboscopic photographs show that the head of a 270 g golf club is traveling at 55 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 46 m/s. Find the spe
An air puck of mass 0.273 kg is tied to a string and allowed to revolve in a circle of radius 0.85 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.48 kg is tied to
sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 m/s. What is the difference in time that the message is received?
Planet Z is 9,000 km in diameter. The acceleration due to gravity on Planet Z is 8.5 m/s2. What is the mass of Planet Z?
In New England, the horizontal component of the Earth's magnetic field has a magnitude of 1.4 x 10-5 T. An electron is shot vertically straight up from the ground with a speed of 3.9 x 106 m/s. What is the magnitude of the acceleration caused by t
An ancient club is found that contains 120 g of pure carbon and has an activity of 7 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.1x10-12. Note that the half life of carbon-14 is 5700 yea
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