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A fairground attraction called The Rotor (shudder) is spinning drum with a movable floor that is dropped down as the drum speeds up. The people inside are held up on the walls by friction. If the minimum coefficient of friction expected between people's clothes and the wall is 0.50, find what rotation rate is required before the floor is dropped? (Suppose the drum has a radius of 5.0 m).
A small mass is stuck to a point on the rim of a rolling wheel(radius of r) .. which traces out a path called a cycloid. The position vector of this point is given by r(theta)= r(theta - sin theta)i +r(1-cos theta)j. For a wheel rolling with constant..
Suppose that you forget to turn the headlights off in yourparked automobile. If each of the two headlights draws 3 A, how long will it be fefore your battery is "dead"
large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical
the old baker bowl centerfield fence was about 408 feet from home plate. home run balls needed to be at least 35 feet
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 558 nm, What is the difference in path lengths from the two slits to the location of a third order bright frin..
An particle with a charge value of 0.21 C is moving in the presence of an electric field of 5.5 N/C. What force does the particle experience
Drawing on Erastothenes' method, if two observers are due north and south of each other and are separated by 490 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 29 degrees and 45 degr..
a 10g block with a charge of 810-5 c is placed in an electric field e 3000i-600j nc what are the magnitude and
Suppose you are driving a car around in a circle of radius 182 ft, at a velocity which has the constant magnitude of 33 ft/s. What angle (in degrees) will the string make with the vertical
The "Screaming Swing" is a carnival ride that is - not surprisingly - a giant swing. It's actually two swings moving in opposite directions. At the bottom of its arc, a rider in one swing is moving at 30 m/s with respect to the ground in a 56-m-diame..
A wheel is spinning at 89 rad/s. Itundergoes an angular acceleration of 13rad/s2 until it reaches an angular velocity of243 rad/s. Determine how many revolutions it made while spinning up
An electron moving parallel to the x axis has an initial speed of 3.70x10^6 m/s at the origin. Calculate the potential difference between the origin and that point.
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