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A 109-kg horizontal platform is a uniform disk of radius 1.61 m and can rotate about the vertical axis through its center. A 69.9-kg person stands on the platform at a distance of 1.07 m from the center and a 29.9-kg dog sits on the platform near the person, 1.43 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
A firefighter a distance d from a burning building directs a stream of water from a fire hose at angle ?i above the horizontal, at what height h does the water strike the building
To stretch a certain spring by 2.90cm from its equilibrium position requires 7.50J of work. What is the maximum force required to stretch it by that distance
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. 1-Find the volume of the cylinder. 2-Calculate the probable percent error in the length. 3-Calculate the probable percent..
A 66 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15° above the horizontal. what is the magnitude of the initial acceleration of the crate
The perihelion distance from the sun for the planet Uranus is 2.750E9 km; the aphelion distance is 3.000E9 km. Calculate the eccentricity of the orbit of Uranus
an irregular object is suspended by a wire from its center. when a torque of .14 N.m is applied, to the object, find the inertia of the object
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.0 mm. Conductor B is a hollow tube of outside diameter 4.1 mm and inside diameter 3.1 mm. What is the resistance ratio RA/RB , measured b..
You have a cup containing 220 g of freshly brewed coffee which, at 75C, is too warm to drink. estimate how much the entropy of the universe increases
When 165 grams of an unknown metal at 225 degrees C is placed into 875 grams of water at 24.4 degrees C inside a perfect calorimeter, Find the specific heat capacity of the unknown metal
A 20.0g ball of clay traveling east at 8.00m/scollides and sticks together with a 20.0g ball of clay traveling north at 8.00m/s. What is the speed of the resulting ball of clay
The average resistivity of the human body (apart from surface resistance of the skin) is about 5.5 ?·m. What is the resistance between the hands if the skin resistance is negligible
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