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A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to10 rad/s over the next 4.0 seconds. Suppose that the angular acceleration is constant.
1. What is the average angular speed of the grindstone?
2. What is the magnitude of the angular acceleration of the grindstone?
3. Through how many revolutions does the grindstone turn through the 4.0 second interval?
The position function x(t) of a particle moving along an x axis is x = 4.0 - 4.5t2, with x in meters and t in seconds. At what negative time does the particle pass through the origin
It walks 2.1 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find out how far the dog is then from the shore.
The three charges in the figure below are at the vertices of an is osceles triangle. Let q = 1.00 nC and calculate the electric potential at the midpoint of the base.
What is the free-fall acceleration toward the sun at the distance of the earth's orbit? [The mean distance the earth is from the sun in its orbit is 1.50x10^11 m
how does the force curve compare to the distance curve? what differences are there? what would you say is the
q1. a standardized biological microscope has an 8.0--focal-length objective. what focal-length eyepiece should be used
A peregrine falcon dives at a pigeon. The falcon starts with zero downward velocity and dives with the free-fall acceleration. how long does it take the falcon to intercept the pigeon
A middle-aged man starts to wear eye glasses with lenses of1.5 D that allow him to read a book held as close as25 {\rm cm}. Several years later, hefinds that he must hold a book no closer than 33 cm to read it clearly with the same glasses, sohe g..
A parallel-sided plate of glass having a refractive index of 1.58 is in contact with the surface of water in a tank. What angle does this ray make with the normal in the water
Prior to the music CD, stereo systems had a phonographic turntable on which vinyl disk recordings were played. calculate the total number of rotations for the complete start-up
A magnetic dipole antenna is used to detect an electromagnetic wave. The antenna is a coil of 50 turns with radius 5.1 cm. The EM wave has frequency 870 kHz, electric field amplitude 0.56 V/m, and magnetic field amplitude 1.87 10-9 T.
What's the charge of a glass rod after rubbing it on silk? What's the charge of silk afterrubbing with a glass rod ? What's the charge of a rubberrod after rubbing it on fur or wool? What's the charge of fur or woolafter rubbing it with a glass rod?
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