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A tennis player hits a 58.0 tennis ball so that it goes straight up and reaches a maximum height of 6.35. How much work does gravity do on the ball on the way up? How much work does gravity do on the ball on the way down?
A bird flies 25.0 m in the direction 55° east of south to its nest. What are the northward and westward components of the resultant displacement of the bird
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. Its objective lens is 40 inches (slightly over a meter) in diameter. What are the focal lengths of the two lenses
You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1.8 x 10^(7) m and its rotation period to be 22.3hours. What is the mass of the planet and star
he edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. calculate the least count of the micrometer
A 54-kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. Find the work done by the kinetic frictional force that acts on the skis
The position vector,r, in meters, of a particle moving in the x-y plane, is giving by the following equation: r=i(2t^2-8t-12)+j(2t^3-18t^2+48t+25), find the direction of the velocity vector at the instant
Light bends when it passes obliquely from one medium to another, taking somewhat a longer path form one point to another. What does this longer path have to do with the time of travel of light
Bats use echolocation to determine their distance from objects they cannot easily see in the dark. how close was she to the wall when she received the echo
A 50 kg uniform disc with a radius 1.5 is accelerated from rest to angular speed 3.5 rad/s; how much work is required to achieve this
assume the mass of cart 1 is m1 = 234 g and the mass of cart 2 is 181 g. Calculate the energy lost in the collision
Carbon tetrachloride (n=1.46) is poured into a container made ofcrown glass (n=1.52). what is the angle of the corresponding refracted ray
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