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One end of a wire is attached to a ceiling, and a solid brass ball is tied to the lower end. The tension in the wire is 140 N. What is the radius of the brass ball?
A cylindrical rod with a diameter of 2.54 cm and a length of 76.2 cm is initially at a temperature of 20.0 C. Next, After reaching equilibrium, what is the volume of the rod
The force shown in the attached figure is the net eastward force acting on a ball. The force starts rising at t = 0.020 s, falls back to zero at t = 0.062 s, Find the area of a nearly equally sized triangle
A refrigerator has a surface area of 6.04 m2. It is lined with 0.0885-m-thick insulation whose thermal conductivity is 0.0300 J/(s m C °). How much heat per second is being removed from the unit
A generator rotates at 87Hz in a magnetic field of 9.0×10?2T . It has 600 turns and produces an rms voltage of 180V, find the area of each turn of the coil
A wire segment of length 4.75 cm carries a 3.46 A current. This wire is placed within a uniform magnetic field. find the angle between the two orientations of the wire
The ice has a thickness of 4.75 10-4 m, and the windshield has an area of 1.25 m2. The density of ice is 917 kg/m3. Explain how much heat is required to melt the ice?
A 72 kg man in a 5-kg chair tilts back so that all weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with the radius of 1.0 cm, and find out the pressure exerted on the floor by eac..
If the crate was at rest at the top of the incline and has a speed of 2.20m/s at the bottom, how much work Wf was done on the crate by friction
If the mass of the child and sled is 40 {rm kg}, what average force do you need to apply to stop the sled? Use the concepts of impulse and momentum.
An image projected on a screen is 9.1 cm high and is 6.4 cm from the lens. If the object that produces the image is 1.2 cm tall on the screen
During the launch from a board, a diver's angular speed about her center of mass changes from zero to 4.50 rad/s in 220 ms. FIND the magnitudes of her average angular acceleration
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
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