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A softball pitcher rotates a 0.250 kg ball around a vertical circular path of radius 0.4 m before releasing it. The pitcher exerts a 25.0 N force directed parallel to the motion of the ball around the complete circular path. The speed of the ball at the top of the circle is 17.0 m/s. If the ball is released at the bottom of the circle, what is its speed upon release?
____m/s
a molten plastic flows out of a tube that is 8.0 centimeters long at a rate of 13cm^3/min, find the viscosity of the plastic
The electron in a hydrogen atom is infinitely distant at zero potential energy, What is the nearest principal quantum number in this state
Two batteries in parallel, each of emf 10 V and internal resistance 0.5 ?, are connected to an external 20 ? resistor. Find the current in the external resistor.
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
A probe is traveling in deep space at a speed of 4000 m/s. It has a total mass of 5000 kg. It fires its rocket motor to brake to 3000 m/s, what is the probe's final velocity
A 13.5 micro F capacitor is connected to a power supply that keeps a constant potential difference of 26.0 V across the plates. By how much did the energy change during the insertion
Three radio-equipped plumbing vans are broadcasting on the samefrequency f0. Van 1 is moving east of van 2 with thespeed v, What is the frequency of each van as received by theothers
An object of mass 2.98 kg, moving with an initial velocity of 4.97 m/s, collides with and sticks to an object of mass 2.54 kg with an initial velocity of -3.92 m/s. Find the final velocity of the composite object
a bicyclist is traveling at a speed of 20m/s as he approaches the bottom of a hill. He decides to coast up the hill and stops upon reaching the top. determine the vertical height of the hill
find the velocity of the ball when it strikes the ground
Why is it better for some purposes to use a medium size telescope on a mountain instead of a telescope in space?
In an X-ray tube electrons strike a tungsten target (W or "wolfram") after being accelerated through a potential difference V0. Estimate the minimum value of V0 required to observe the Kalpha peak.
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