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Why is the following situation impossible? A softball pitcher has a strange technique: she begins with her hand at rest at the highest point she can reach and then quickly rotates her arm backward so that the ball moves through a half-circle path. She releases the ball when her hand reaches the bottom of the path. The pitcher maintains a component of force on the 0.180-kg ball of constant magnitude 12.0 N in the direction of motion around the complete path. As the ball arrives at the bottom of the path, it leaves her hand with a speed of 25.0 m/s.
A particle moves from an initial position with coordinates x = -2.0 m, y = +3.0 m, What is the magnitude of the average velocity for this displacement
Two capacitors have the same plate separation, but one has square plates and the other has circular plates, at is the dielectric constant kcircular of the material between the circular plate
After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, If the player comes to rest at third base, what was the coefficient of kinetic friction between the player and the ground
The work function of a particular substance is 4.15 × 10-19 J. What is the photoelectric cutoff wavelength for this material
For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. The period of this sound is 73.1 ms. Determine the wavelength of the sound
What is the acceleration at an altitude equal to half the planetary radius for Mars and Saturn.
a charged particle of mass m and charge q is suspended from a light thread in a region of space where there is a
If both ropes BCA and CD can support a maximum tensile force = 160 , what is the maximum weight of the crate that the system can support? Illustrate what is the angle required for equilibrium
An electron confined in a one-dimensional box is observed, at different times, to have energies of 32.5 eV, 57.8 eV, What is the length of the box
In order to keep a leaking ship from sinking, it is necessary to pump 11.0lb of water each second from below deck up a height of 1.50m and over the side. What is the minimum horsepower motor that can be used
An RLC circuit with R = 29.7\Omega , L = 347mH , and C = 48.8\mu F is connected to an ac generator with an rms voltage of 28V . Determine the average power delivered to this circuit
You are designing a small coil (called a search coil) to measure magnetic fields. It is to have a diameter of 3.80 cm, How many turns should the coil have
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