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A tether ball moves around the pole in a horizontal circle with radius 1.5m. If the mass of the ball is 1.3 kg, and the speed of the ball is 5.4 m/s, what angle does the rope make with the pole.
A 44-g ball consists of a plastic spherical shell and a water-filled core. the shell has an outside diameter equal to 41.6 mm and an inside diameter equal to 16.5 mm. What is the density of the plastic?
A high-voltage copper transmission line with a diameter of 2.60 cm and a length of 130 km carries a steady current of 1.03 103 A. what time interval does one electron travel the full length of the line
The orbital angular momentum of an electron has a magnitude of 4.716*10^-34 kg*m^2/s. What is the angular-momentum quantum number l for this electron
A pipe is horizontal and carries oil that has a viscosity of 0.15 Pa · s. The volume flow rate of the oil is 5.8 10-5 m3/s. What is the absolute pressure at the input end
An object with total mass mtotal = 14 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.6 kg, What is the magnitude of the velocity of the center of mass of the pieces after the collision
Now suppose that the two masses continue to move at the speed from Part A until they encounter a rough surface. The coefficient of friction between the masses and the surface is . If the blocks come to rest after a distance, which of following equ..
A hovercraft of mass 69.0 kg can move on a horizontal surface, the x-y plane. How much work is done on the hovercraft by the force during this time
A molecule of DNA (deoxyribonucleic acid) is 2.09 µm long. The ends of the molecule become singly ionized: negative on one end, compute the effective spring constant of the molecule
A plane flies 338 km at an angle of 22.3 degrees north of east. find the displacement the plane must now take to reach the airport
(from Roger Ordidge, with alterations) The magnetic field can store energy, but it can do no work. Therefore, another agency must be responsible for doing the work that puts the energy into the magnetic field. In order for the energy in the field ..
Vector A, which is directed along an x axis, is to be added to vector Bvec , which has a magnitude of 3.0 m, with a magnitude that is 5 times that of A, What is the magnitude of A
q1. a certain metal with atomic mass 2.6 times 10-25kg has an interatomic bond with length 1.7 times 10-10 m and
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