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Two concentric metal spheres are found to have a potential difference of 646.0 V when a charge of 2.816·10-8 C is applied to them. The radius of the outer sphere is 0.188 m. What is the radius of the inner sphere?
A curve in a highway has radius of curvature 120 m and is banked at 2.8°. what is the safest speed to go around the curve
A 2100 kg car traveling to the right at 32m/s is chasing a second car of the same mass that is traveling to the right at 10m/s.
Vinny (m= 40 kg) is at rest on ice ( which we'll assume is frictionless) holding a gun ( m=1 kg). Each bullet in the gun has a mass of 20 grams and fires at 400 m/s. How much chemical energy was stored in the unfired bullets
A grasshopper makes four jumps. The displacement vectors are (1) 25 cm, due west; (2) 23.5 cm, 50° south of west; (3) 24.5 cm, 56° south of east; and (4) 36 cm, 43° north of east. Find the magnitude and direction of the resultant displacement. Expres..
questiona student standing on a stationary skateboard tosses a textbook with a mass of mb 1.55 kg to friend standing
A 52.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
A pipe with a diameter of 2.88 cm is carrying 134 liters/minute of water with an overpressure (gauge pressure) of 3.65 atmospheres. Find the overpressure of the water in the pipe at the top of the building
What is magnitude of the speed of the boat
A second converging lens of focal lenght 12 cm is placed to the right of the first lens. If the final image of the combined lens system is virtual and 15 cm from the second lens, then compute the distance between the two lenses
A point charge q = +37.0 µC moves from A to B separated by a distance d = 0.178 m in the presence of an external electric field, Find the work done by the electric force
A 30,000-kg freight car is coasting at 0.850 m/s with negligible friction under a hopper that dumps 110,000 kg of scrap metal into it. What is the final velocity of the loaded freight car
A student drops two metallic objects into a 120-g steel container holding 150 g of water at 25°C. One object is a 230-g cube of copper that is initially at 85°C, What is the mass of the aluminum chunk
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