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A 20kg hollow plastic sphere with a diameter of 130cm is used as a float to support an iron block in the water. A wire connects the sphere to the block and the sphere Is half submerged
(a) What is the mass of the iron block?
(b) What is the tension in the wire?
A distant galaxy is simultaneously rotating and receding from the earth. As drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.8 x 10^6 m/s.
A bullet with mass 5.06 g is fired horizontally into a 2.038-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
The speed of an arrow fired from a compound bow is about 29 m/s. An archer sits astride his horse and launches an arrow into the air elevating the bow at an angle of 35 degrees above the horizontal, What is the arrow range
A camera with a 70.0-mm lens can focus on objects located from 1.40 m to an infinite distance away by adjusting the distance between the lens and the film. how far does the lens move with respect to the film
Two small spheres hang in equilibrium at the bottom ends of threads, 40.0 cm long, Find the distance between the centers of the spheres
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). How far is the object from the converging lens
You are in charge of the construction site of a new dam. Extremely heavy rainfall starts and Bureau of Meteorology hydrologists tell you that beginning at about 8 AM, 2 GL per hour (2 x 10^6 meters^3 per hour) will flow into the dam. The lake behi..
The K-shell ionization energy of copper is 8979 eV. The L-shell ionization energy is 951 eV. Determine the wavelength of the Kα emission line of copper. What should be the minimum voltage be on an x-ray tube with a copper target in order to see the K..
A roller coaster car (mass = 988 kg including passengers) is about to roll down a track. At what speed does the car reach the top of the loop
A horizontal 810-N merry-go-round of radius 1.30 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round
Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a point on its axis a distance 2R from the center
Find the acceleration of gravity on the surface of Mercury and find the acceleration of gravity on the surface of Venus.
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