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A rock is thrown directly upward at 30 m/s from the edge of the roof of a building that is 20.0 meters tall. The rock misses the building on its way down. What is the velocity of the rock when it is at 10.0 m above the ground?
A nuclear power plant has a reactor that produces heat at the rateof 750 MW. What is the thermal efficiency of the plant
An airplane travels 170 m/s as it makes a horizontal circular turn which has a(n) 1.4 km radius. What is the magnitude of the resultant force on the 150 kg pilot of this airplane
In a double-slit experiment, what is the linear distance on the screen between adjacent maxima if the wavelength is 538 nm
In a slide or movie projector, the film acts as the object whose image is projected on a screen. how wide will the picture be on the screen
Camera lenses are described in terms of their focal length. A 50 mm lens has a focal length of 50 mm, Locate the position of the image
A proton is projected perpendicularly into a magnetic field that has a magnitude of 0.29 T. What is the magnitude of the field used for the electron
How many helium-filled balloons would it take to lift a person, Assume the person has a mass of 80kg and that each helium-filled balloon is spherical with a diameter of 33 cm
A block of mass 5kg is attached to a spring of 3000N/m and compressed a distance of 0.3m. What are the period, frequency, and angular frequency
Santa loses his footing and slides down a frictionless, snowy roof that is tilted at an angle of 29.0 degrees. what is his speed as he leaves the roof
Comet Halley moves about the Sun in an elliptical orbit with its closest approach to the Sun being about d1=0.59 AU, What is its speed when it is furthest away from the sun
a cable of cross-sectional area of 4.00 cm2 and 12.0 m long stretches by 2.00 mm when subjected to a load of 25000 kg.
wo stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, At what time do the two cars collide
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