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A student constructs an astronomical telescope with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the resulting length of the telescope?
A disk of radius 10 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.2 rad/s2. compute the angular velocity of the disk
You bike at 10.3 m/s directly away from your neighbor\'s trumpet sound and toward the sound of another neighbor\'s trombone, What frequency is the trombonist producing
people often use the term energy crisis implying that we are running out of energy. how can this be if energy is
The safe slides with a constant speed if Clyde pushes from behind with 420 {rm N} of force while Bonnie pulls forward on a rope with 285 {rm N} of force. Illustrate what is the safe's coefficient of kinetic friction on the bank floor?
A wheel accelerates from rest to 12 rad/s at a rate of 78 rad/s^2. Through what angle (in radians) did the wheel turn while accelerating
A tennis player standing 12.6 m from the net hits the ball at 2.79° above the horizontal. how fast was the ball moving when it left the racket
You pull a 12 kg sled across the floor with a strap that is at an angle of 31° above the horizontal with a force 76 N. Determine the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the suitcase an..
Transverse waves with a speed of 48.7 m/s are to be produced on a stretched string. What is the required tension in the string
A 20-N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 7.0 m/s
Heat Q flows spontaneously from a reservoir at 445 K into a reservoir at 265 K. Because of the spontaneous flow, 2620 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 265 K and a reservoir at 248 K. ..
A generator produces 60 A of current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 Ù
One of the asteroids, asty, looks like an elongated potato. Surprisingly it has a tiny (compared to asty) spherical moon! Find the acceleration of gravity on the surface of this little moon
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