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A ball is thrown straight upward and rises to a maximum height of 18 m above its launch point. At what height above its launch point has the speed of the ball decreased to one-half of its initial value?
n object of mass "m" specific heat "Cp" & surface area "As" is initially at a temperature "To". Rate of Heat gained by Object = Rate of Heat Lost by Gas m, Cp, h, A & Tg are all constants.
A high-voltage transmission line with a resistance of 0.28 omegacap.gif/km carries a current of 1040 A. What fraction of the transmitted power does this loss represent
a baseball is thrown from the roof of a building of height 20.6 with an initial velocity of magnitude 14.0 and directed
A 200kg block is at rest on a horizontal table. The coefficient of kinetic and static friction among the table and the block is 0.60 and 0.40 respectively. An 1800N force is then applied on the block.
Find the total mechanical energy of a mass-spring system with m = 1.46kg and maximum speed 0.600m/s
a vertical spring ignore its mass whose spring stiffness constant is 820 nm is attached to a table and is compressed
A gun shoots small plastic balls. The ball falls 1.2 m while traveling horizontally 5.1 m. Calculate the speed the ball leaves the gun
Anne is farsighted; the nearest object she can see clearly without corrective lenses is 2.0 meter away. Find the focal length of her contact lenses be therefore that she can see clearly objects as close as 18.0cm from her eye
q1. a point charge is distance from the center of the dipole consisting of charges separated by distance. the charge is
High-speed stroboscopic photographs show that the head of a 250. g golf club travels at 60.0 m/s just before it strikes a 47.0 g golf ball at rest on a tee. What is the velocity of the golf ball just after the impact by the club
A laser emits a narrow beam of light. The radius of the beam is 3.9 mm, and the power is 3.6 mW. What is the intensity of the laser beam
A group of hikers hears an echo 5 s after shouting. If the temperature is 16.0°C, how far away is the mountain that reflected the sound wave.
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