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Many 2.5-in-diameter (6.35 cm) disks spin at a constant 7200 rpm operating speed. The disks have a mass of about 7.5 g and are essentially uniform throughout with a very small hole at the center. If they reach their operating speed 2 s after being turned on, what average torque does the disk drive supply to the disk during the acceleration?
Determine the tension T in the string.
does the non-Coulomb electric field curl clockwise.
In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16 x 10^8 Pa. What is the density of seawater at this depth
An electrically neutral thin, square metal slab, measuring 6.00cm on a side is placed in a uniform external field that is perpendicular to its square area. What is the total charge on the negative side of the slab
You have a small electromagnet that consumes 300 W from a residential circuit delivering 120 V at 60.0 Hz. find the internal resistance of the electromagnet
Assuming the Earth's magnetic field averages about 0.50×10?4 T near Earth's surface, estimate the total energy stored in this field in the first 7.0km
The drawing shows two situations in which charges are placed on the x and y axes. They are all located at the same distance of 8.50 cm from the origin O. For each of the situations in the drawing, decide the magnitude of the net electric field at the..
The bulk modulus of aluminum is 7.1 1010 N/m2. If the density of aluminum is 2.7 103 kg/m3, then what is the speed of sound in aluminum
in a television tube electrons initially at rest are accelerated by a uniform electric field of magnitude 4.0 times 105
1. A 50.0 kg block is pulled from rest by a force of 1000.0 N at an angle of 37.0° across a horizontal rough surface over a distance of 5.60 m. The coefficient of kinetic friction between the block and the surface is 0.500.
M1 is five times more massive than M2. One force acts on the hanging mass, but the net force acts on both masses. Once you have the acceleration, you can compute the distance.
An oscillating block-spring system has a mechanical energy of 1.00 J, an amplitude of 9.9 cm, and a maximum speed of 1.13 m/s. Find the spring constant
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