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1. What is the magnification of an astronomical telescope whose objective lens has a focal length of 80 cm and whose eyepiece has a focal length of 2.3 cm?
2. What is the overall length of the telescope when adjusted for a relaxed eye?
An artificial earth satellite has a circular orbit of radius 7.10 multiply.gif 106 m in an equatorial plane. Compute the (constant) speed of the satellite
The focal length of the human eye is approximately 1.7 cm. What is the f-number for the human eye in bright light, when the pupil diameter is 3.0mm
a shower head has 20 circulaar openings, each with radiius 1.0 mm. what is its speed as it exits the shower head openings
When people exercise they shed heat to the environment by sweating and radiating. calculate the rise in body temperature after 1 hour
Given a uniform ring of charge, with charge q=+30E-6 C and radius 0.2 m. Find the magnitude of linear charge density for the ring
Two rectangular pieces of plane glass are laid one upon the other on a table. A thin strip of paper is placed between them at one edge, Find the angle of the wedge
A 7.50 kg box is pushed across a floor by a constant force applied force at 25 degrees. the box starts from rest and moves at 1.20 m/s after the box is moved 5.00 meters. The coefficient of friction is .320 What is the magnitude of the force applied ..
A 150 kg rock (density is 2500 kg/m 3 ) is dropped to a lake. Determine how much force the man needs to life the rock from the bottom of the lake
The upward normal force exerted by the floor is 610 N on an elevator passenger who weighs 660 N. What is the reaction force to weight of the passenger
The length of the ice block is L1 = 0.00484 m and its temperature is T1 = -11.0 °C. The aluminum block is L2 = 0.00139 m long, Calculate the heat per second per square meter
A train engineer blows a whistle that has a frequecy of 4.0 X 10^2 hz as the train approaches a station. if the speed of the train id 25 m/s, what frequency will be heard by a person at station.
Suppose you do 457 J of work on 1.18 moles of ideal gas in a perfectly insulated container. By how much does the internal energy of this gas change.
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