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The drawing shows a circus clown who weighs 980 N. The coefficient of static friction between theclown's feet and the ground is 0.42. Hepulls vertically downward on a rope that passes around threepulleys and is tied around his feet. What is the minimum pullingforce that the clown must exert to yank his feet out from underhimself?
A charge of -3.65 nC and a charge of -6.70 nC are divorced by a distance of 70.0 cm. Find the position at which a third charge of +7.30 nC can be placed so that the net electrostatic force on it is zero.
A water droplet of radius 0.015 mm remains hanging stationary in the air. If the electric field of Earth is 100 N/C, how many electrons must the water droplet lack? In which direction the electric field of Earth must be directed for that problem to m..
In an insulated vessel, 260 g of ice at0°C is added to 630 g of water at19.0°C. What is the final temperature of the system? How much ice remains when the system reaches equilibrium?
A supertrain of proper length 97 m travels at a speed of 0.91c as it passes through a tunnel having proper length 50 m. As seen by a trackside observer, is the train ever completely within the tunnel? Yes No If so, how much room does it have to spare..
In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. What is the minimum coefficient of friction needed between the wall and the person
Two lenses that are L = 42 cm apart are used to form an image, as shown in figure. Find the distance from lens and magnification of the image.
A parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material. What is the dielectric constant of the material that was initially used to fill the gap between the plates
a chain is held on a frictionless table with 1/5 of its length hanging over the edge. how much work is required to pull the hanging part back
A series RLC circuit has R = 75 %u03A9, L= 20 mH, and a resonance frequency of 4.0 kHz. What is the impedance of the circuit at resonance
White light is incident on a soap film (n = 1.29) in air. compute the minimum thickness of the soap film
In a 231-turn automobile alternator, the magnetic flux in each turn is fB = (2.36E-4 T*m2) cos(?t), where ? is the angular speed of the alternator. determine the maximum emf in the alternator
A car is parked at the top of a 52m -high hill. It slips out of gear and rolls down the hill. How fast will it be going at the bottom
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