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The lens of a slide projector with a focal length of a 120 mm projects a slide onto a screen that is 13 m away. How far from the lens must the slide be placed to form a sharp image on the screen? (in cm)
A 12-kg hammer strikes a nail at a velocity of 8.5 m/s and comes to rest in a time interval of 8.0 ms. What is the average force acting on the nail
A 2 kg projectile is fired with an initial speed of 135 m/s at an angle of 68° with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 0.72 kg and 1.28 kg. At 3.8 s after the explosion, the 1.28 kg f..
A 75.00 ? resistor, a 95.00 mH inductor, and a 55.00 ?F capacitor are connected in series with an ac source with amplitude of 50.00 V. What is the natural angular frequency
Approximately how many atoms make up our planet? For simplicity, suppose the average atomic mass of the atoms is 14 . Avogadro's number gives the number of atoms in a mole.
The current in a 1.70mm Ã? 1.70mm square aluminum wire is 1.80A. compute the electron drift speed
a ball is hit from the ground with an innitial velocity of 25ms into the air. it is to land in a hole that is 10m
a 10 kg block is attached to two springs as shown and held with the springs streched at an angle. the springs constants
The fast train known as the TGV Atlantique (Train Grande Vitesse) that runs south from Paris to Le Mans in France has a top speed of 310 km/h. If there is a curve with a 1.00 km radius, to what speed must the train be slowed
A loudspeaker of mass 20.00 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
A speedboat increases its speed uniformly from 20 m/s to 30 m/s in a distance of 200m. Find (a) the magnitude of its acceleration and (b) the time it takes the boat to travel the 200-m distance.
A technician wraps wire around a tube of length 33 cm having a diameter of 8.1 cm. what is the self-induced emf in the solenoid
You are standing on the ground at the origin of a coordinate system. Determine the magnitude and orientation of the airplane's position vector at t = 70.0 s
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