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1. If a mass of 220 kg acts downward 0.5 m from the axis of rotation (location of the fulcrum) on one end of a board. On the other side of the board, a mass of 90kg also acts downward, what is the moment arm (with respect to the fulcrum) of the second force to balance this system (in m)?
2. A 60kg woman dives from a 18m cliff. What is her velocity 6m into the dive (in m/s)? Assume no external forces are applied during diving.
3. The moment of inertia of an object is 5.5 kgm2. It is moving at an initial angular velocity of 10 rad/s. If the object's velocity increases to 60 rad/s, what is the angular impulse exerted on the system?
Standing waves on a wire are explained by y(x,t)=(ASWsinkx) sin ?t, with ASW = 3.00mm , ? = 975rad/s, and k = 0.790rad/m. The left end of the wire is at x = 0.
A circuit board inside of a GPS receiver is being designed to operate at 1.6 GHz. The circuit layout calls for a 8 pF capacitor as part of a low-pass filter, however a lumped element capacitor is not available at this frequency.
A top is a toy that is made to spin on its pointed end by pullingon a string wrapped around the body of the top. The string has alength of 56 cm and is wound around thetop at a spot where its radius is 1.2 cm.The thickness of the string is negligi..
The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. If an underwater vehicle were to explore such a depth, what force would the water exert on the vehicle's observation window
A large steam pipe is covered with 1.7-cm-thick insulating material of thermal conductivity 0.31 J/(s m °C). How much energy is lost every second when the steam is at 185 °C
10-nC point charge is located at the center of a thin spherical shell of radius 8.0 cm carrying -20 nC distributed uniformly over its surface. What is the magnitude of the electric field 2.0 cm from the point charge
A 12gram bullet moving horizontally strikes and remains in a 3 kilogram block initially at rest on the edge of a table. Evaluate what was the initial speed of the bullet
What is the acceleration magnitude of the red car?
the nickel-metal hydride battery in your cell phone has a 1.2-v emf and it can be recharged about 1000 times.
Light visible to humans consists of electromagnetic waves with wavelengths (in air) in the range 400-700 nm (4.0 10-7 m to 7.0 10-7 m). What are the frequencies of electromagnetic waves that are visible
Two point charges are placed on the x-axis. The first charge,q1 = 8.00 nC, is placed a distance 16.0 m from the origin along the positive x-axis; the second charge, q2 = 6.00 nC, is placed a distance 9.00 m from the origin along the negativex-axis.
A certain FM radio tuning circuit has a fixed capacitor of 870 pF. Determine what range of values must the inductance have to tune stations from 86 MHz to 108 MHz
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