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A string wrapped around a peg (diameter=2.00 cm) along the axis of a top is pulled with a constant tension of 5.92 N. Starting from rest, the top reaches an angular velocity of 480 rpms after turning 5 complete revolutions (at this point, the string is completely unwound). what is the moment of inertia of the top?
A nuclear power plant generates 2000 MW of heat energy from nuclear reactions in the reactor's core. What is the plant's actual efficiency
When you walk past an open door of a room in your house in which a person is speaking, you can hear the person long before you can see him. Why? What does this tell you about the wavelengths of light and sound?
Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 800 N, How far did he slide down the pole
A ?ghter plane ?ying at constant speed 420 m/s and constant altitude 10000 m makes a turn of curvature radius 2800 m. On the ground, the plane's pilot weighs (62 kg)(9.8 m/s2) = 607.6 N. W
If you hold a horizontal metal bar several centimeters above the ground and move it through grass, each leaf of grass bends out of the way. How can it exert enough force on a leaf of grass to shear it off
Suppose you aim to suspend in air a perfectly reflecting 4cmx4cm surface, with mass m = 0.00045kg. What intensity of light must you shine on it
A small rigid object carries positive and negative 4.00 nC charges. It is oriented so that the positive charge has coordinates (-1.20 mm, 1.50 mm), find the electric dipole moment of the object
A cylindrical capacitor consists of a solid inner conducting core with radius 0.300cm , surrounded by an outer hollow conducting tube. what is the charge per unit length lambda on the capacitor
What is the physical meaning of the y-intercept?
Two equal and opposite charges of magnitude 2.00µC and -2.00µC are held .15 m apart. What force (magnitude & direction) would act on an electron placed at the midway point
The light ray makes an angle of α = 32.1° with the normal line at the boundary of linseed oil and water. find the angles θ1 and θ2. Note that n = 1.48 for linseed oil.
An 18 mm wide diffraction grating has rulings of 710 lines per mm. What is the largest angle from the normal at which an intensity maximum is formed
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