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What is the magnifying power of an astronomical telescope consisting of a reflecting mirror whose radius of curvature is 7 m, and an eyepiece whose focal length is 25 mm?
A wheel with radius 43.9 cm rotates 4.27 times every second. What is the tangential speed of a wad of chewing gum stuck to the rim of the wheel
A 55.3-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
An engineer is designing a runway for a new airport. Of the planes which will use the airport, the lowest acceleration rate will be 3 m/s2. Assuming the minimum acceleration, what is the minimum allowed length for the runway
A car is parked on a steep incline, making an angle of 37.0° below the horizontal and overlooking the ocean, when its brakes fail, Find the velocity of the car when it lands in the ocean
A person with normal eyesight uses a converging lens of focal length 10 cm. At what distance from the job he must hold the lens
Air that initially occupies 0.47 m3 at a gauge pressure of 100 kPa is expanded isothermally to a pressure of 101.3 kPa, Compute the work done by the air
Studies of the relationship of the sun to our Galaxy- The Milky Way - Have revealed that the sun is located near the outer edge of the galatic disc, what is the period of the sun's galactic motion
A satellite is in a circular orbit about the earth (M = 5.98 x 1024 kg). The period of the satellite is 6.84 x 104 s. What is the speed at which the satellite travels
q1. to calculate the program suppose she runs up a flight of 85 steps each 0.150 m high in 69.0 s. for ease ignore an
A 1.5kg- block of ice is initially at a temperature of -7.0C a)If 2.6×10^5J of heat are added to the ice, Find the amount of ice, if any, that remains
A ball is thrown straight upward and reaches the top of its path in 1.71 s (before it starts to come back down). A second ball is thrown at an angle of 38.2 degrees with the horizontal. At what speed must the second ball be thrown so that it rea..
A cosmic ray travels 60 km through the earth's atmosphere in 380?s, How long does the journey take according to the cosmic ray
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