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The roof of a two-story house makes an angle of 29° with the horizontal. A ball rolling down the roof rolls off the edge at a speed of 4.6 m/s. The distance to the ground from that point is 7.4 m.
(a) How long is the ball in the air?
(b) How far from the base of the house does it land?
(c) What is its velocity just before landing? (Let upward be the positive y-direction.)
A block with a mass of 40 kg is on an inclined plane with an angle of 20 degrees. Determine the normal force on the block
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a positron emission tomography scanner examines the gamma rays emitted when positrons and electrons annihilate each other. What is the wavelenth of the photons
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A1.20-m-long wire has a resistance equal to0.320?. A second wire made of identical material has a length of1.90m and a mass equal to the mass of the first wire. What is the resistance of the second wire?
A cylinder with a diameterof 0.240 m is placed between the plates of a hydraulic press asillustrated in the drawing. A 4.45 × 105-N forceis applied to the cylinder. What is the pressure on the end of the cylinder due to the applied force?
A pump uses a piston of 15 cm diameter which moves 2 cm/s. What is the fluid velocity of a tube 3mm in diameter
A parallel plate without a dielectric is connected to a battery and has capacitance of 3.2 x 10-10 Farads and a charge of 8.8 micro-Coulombs on its plates. The distance between the plates of the capacitor is 2.6 cm.
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