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A steel wire is strung between two supports attached to aceiling. Initially, there is no tension in the wirewhen it ishorizontal. A 96-N picture is then hung from the center ofthe wire so that the ends of the wire make angles of 26 degreeswith respect to the horizontal.
What is the radius of the wire?
The tension in a 2.5-m-long, 1.2-cm-diameter steel cable (? = 7800 kg/m3) is 850 N. What is the fundamental frequency of vibration of the cable
An elementary particle called a pi meson (or pion for short) has an average lifetime of 2.6×10?8s when at rest. Find the average distance traveled by the pion as measured by the same observer
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; What is the period of the spacecraft's orbit
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to 14 before coming to rest momentarily? answer in m/s.
In redesigning a parallel-plate capacitor with circular plates, you triple both the diameter of the plates and their separation. what is the capacitance of the redesigned capacitor
An experimenter arranges to trigger two flashbulbs simultaneously, producing a big flash located at the origin of his reference frame and a small flash at x = 8.25 km. What time interval between them does she find
An image of the moon is created by reflection off of a concave mirror at a point 6.0cm from the mirror. where will the image be
A bar of lead (bar A) is in thermal contact with a bar of silver (bar B) of the same length and area. Find the temperature at the junction when the energy flow reaches a steady state
A child sitting 1.06 m from the center of a merry-go-round moves with a speed of 1.35 m/s. Calculate the centripetal acceleration of the child
A car traveling 87km/h strikes a tree. The front end of the car compresses, What was the average acceleration of the driver during the collision
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly eight months, as measured by a clock on board the spacecraft, and then return home at the same speed.
An elevator has a mass of1170 kg and carries a maximum load of 786 kg. A constant frictionalforce of 4260 N retards its motion upward. Theacceleration of gravity is 9.8 m/s2 .
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