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A quarterback claims that he can throw the football a horizontaldistance of 196.6 m (215 yd). Furthermore,he claims that he can do this by launching the ball at therelatively low angle of 25° above the horizontal. To evaluate his claim, determine the speed with which this quarterback must throw theball. Assume that the ball is launched and caught at the samevertical level and that air resistance can be ignored. Forcomparison, a baseball pitcher who can accurately throw a fastballat 45 m/s (100 mph) would be considered exceptional.1_____________ m/s
Two identical particles move under the influence of a central force, for which the potential energy function is V(r) = ? (k /r) (1 ? ?a/r), Determine the ratio of the periods
you need to determine the density of an unknown liquid. to this end you perform an experiment with a block and notice that the block floats in this unknown liquid with 4.6 cm of its side submerged. determine the density of the unknown liquid
A fire hose held near the ground shoots water at a speed of 6.2 m/s.At what angle(s) should the nozzle point in order that the water would land 2.5 m away.
Two sound sources of 785.0Hz and 783.4Hz with the same intensity are played together. What do you hear and how frequently
Find the magnitude of the magnetic flux through the floor of a house that measures 23m by 18m . Assume that the Earth's magnetic field at the location of the house has a horizontal component of 2.4×10^?5T pointing north, and a downward vertical compo..
Three blocks are located on a horizontal frictionless table. They are connected by a massless cord, What is the acceleration of the system
A person pushes a 12.3-kg shopping cart at a constant velocity for a distance of 16.5 m on a flat horizontal surface. What is the magnitude of the force that the shopper exerts
A 4.1 kg ball oscillates with a period of 2.6 seconds, and an amplitude of 23. cm. What is the maximum acceleration
Under an outdoor area "yellow" [Na lamp] light, a fiber is placed between but at the edge of two 3 cm glass slides. How thick is the fiber
An air bubble has a volume of 1.49 cm3 when it is released by a submarine 110 m below the surface of a lake. What is the volume of the bubble when it reaches the surface
While on a camping trip, you would like to carry water from the lake to your campsite. You have two non-identical buckets which you attach to a 1.35 m long rod. Which bucket holds more water
Consider two closely spaced and oppositely charged parallel metal plates. The plates are square with sides of length L and carry charges Q and -Q on their facing surfaces. What is the magnitude of the electric field in the region between the plate..
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