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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
In extremely cold weather conditions where the inside thermostat is set to 27 C and the outside temperature is -20 C, How much energy might you lose in one week
At relatively high temperatures nitrogen and oxygen more readily form a compound according to: N2(g) + O2 2NO(g). Calculate kp given that the initial pressures of nitrogen are 95 atm and 80 atm
An emf of 22.0 mV is induced in a 497 turn coil when the current is changing at a rate of 9.0 A/s. What is the magnetic flux through each turn of the coil
A ballon contains 2 lbs of Helium at 70 degrees F, if the pressure of the ballon is 65 psia, what is the volume of the ballon in cubic feet
Intelligent beings in a distant galaxy send a signal to earth in the form of an electromagnetic wave. What is the speed vrel of the galaxy relative to the earth
A boy whirls a stone in a horizontal circle of radius 1.9 m and at height 1.8 m above level ground. obtain the magnitude of the centripetal acceleration of the stone
A pair of slits, separated by 0.180 mm, is illuminated by light having a wavelength of ? = 612 nm. Express this path difference in terms of the wavelength
Suppose a meteor of mass 3.40 1013 kg is moving at 31.0 km/s relative to the center of the Earth and strikes the Earth. What is the change in the angular speed of the Earth due to this collision
Estimates is the acceleration of the object.
The filament of a light bulb has a temperature of 3.48 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.253. Find the surface area of the filament
003 10.0 points A wire is made of a material with a resistivity of 1.72779 × 10^ ?8 ? · m. estimate the resistance of the wire?
A fully loaded station wagon has a mass of 1690 kg. If each of its four tires is inflated to a gauge pressure of 211 kPa, what is the total tire area in contact with road . What least distance are they from each other? The angle might be too large ..
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