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Two telephone poles are separated by 40 m and connected by a wire. A bird of mass 0.50 kg lands on the wire midway among the poles, causing the wire to sag 2.0 m below horizontal. Assuming the wire has negligible mass, what is the tension in the wire?
A wheel of radius 1.0 m is rotating by a constant angular speed of 2.0 rad/s. what is the centripetal acceleration of a point on the wheel's rim?
What is the centripetal acceleration of a point on the perimeter of a bicycle wheel of diameter 70.0 cm when the bike is moving 8.00m/s?
the temperature of a body is increased from -173 c to 357 c. what is the ratio of energies emitted by the body per
an electric dipole has charges of +- 4.55pC that are seperate by 6.00cm. The dipole lies on the x axis and its center is at the origin. Determine the torque on the dipole about its center of mass
A 2.6-kg cart is rolling along a frictionless, horizontal track towards a 1.4-kg cart that is held initially at rest. What is the total momentum of the system of the two carts at this instant
A charge is moving perpendicular to a magnetic field and experiences a force whose magnitude is 2.91*10-3 N. If this same charge were to move at the same speed and the angle among its velocity and the same magnetic field were 45°, what would be the m..
An antifreeze solution is made by mixing ethylene glycol (?= 1116 kg/m3) with water. determine the volume percentage of ethylene glycol in the solution
An object is found to have a weight in air of 500N. It is then tied to a string connected to a balance and immersed in water (density of water is 1000 kg/m3). The scale now reads 450 N. at last the object is immersed in oil and is found to have a ..
A 0.140 kg baseball is thrown with a velocity of 26.2 m/s. It is struck with an average force of 500.0 NM which results in a velocity of 37.0 m/s in the opposite direction
A length of wire has a radius of 3.00 × 10 -3 m and a resistance of 0.200 ?. find the density of free electrons in the wire
what is the shortest height a plane mirror must be so that a person 1.60 meters tall is able to see his or her whole body.
The maximum speed of a 4 kg mass attached to a spring is 0.68 m/s, and the maximum force exerted on the mass is 12 N. What is the frequency of this system
A 3kg dog jumps horizontally into a basket hanging from a mass less string. The basket weights 6kg, Find the initial velocity of the dog
A 90.0-kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s. Where did the lost energy go
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