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The hour hand on a certain clock is 9.0 centimeter long. Determine the tangential speed of the tip of this hand?
A gymnast with mass m1 = 49 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 119 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end ..
You want to design a helium-filled balloon that will lift a whole payload of 1350 kg. Find what volume of helium is required to just barely lift this payload
a .80 meter radius wheel comes off truck that is going 15 ms. it rolls down the road slowing to a stop after rolling
question a nearsighted person wears glasses to correct the problem. the lenses in the glasses have a focal length of
The drawing shows an equilateral triangle, each side of whichhas a length of 4.74 cm. Point charges are fixed to each corner, asshown. The 4.00 C charge experiences a net force due to the chargesqA and qB.
When a force of 3 N was applied, the speed of an object was increased from 20 m/s to 50 m/s in 2 seconds. What is the mass of this object
A circular loop of wire of 250.0 turns is placed perpendicular to a uniform magnetic field of .500 T. The area of the loop is decreasing at a rate of 1.00* 10^-3 m^2 in .400 s. Calculate the induced emf in the loop. please answere in depth
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.75 105 Pa and the pipe radius is 2.60 cm, Find the speed of flow in the lower section
A 54 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2. The mass of the parachute is 7.6 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute..
A communications satellite is a solid cylinder with mass 1135 kg, diameter 0.91 m, and length 1.75 m. Calculate the satellite's rotational kinetic energy about the rotation axis
The coefficient of linear expansion os steel is 0.000012/C. A section of a railroad track consists of 5.0 km in length. By what length would this rail change
Find the thermal efficiency and the specific work of a simple Rankine cycle if the maxium temperature and pressure are 1050oC and 5.0 MPa and the minimum pressure is 20 kPa.
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