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In a "Rotor-ride" at a carnival, people rotate in a vertical cylindrically walled "room." pt a If the room radius was 5.2 , and the rotation frequency 0.35 revolutions per second when the floor drops out, what minimum coefficient of static friction keeps the people from slipping down? [Hint: Draw a free-body diagram for a person.] pt b People on this ride said they were "pressed against the wall." Is there really an outward force pressing them against the wall?
High-speed photos of a 240 flea jumping vertically show that the jump lasts 1.4 and involves an average vertical acceleration of 100, What's the change in the flea's momentum during its jump
What is the fundamental resonant frequency of the air column if the velocity of sound in the air is 340 m/s.
A cheerleader waves her pom-pom in SHM with an amplitude of 18.8 cm and a frequency of 0.870 hz. Find the maximum magnitude of the velocity
The current in a 51 resistor is 0.14 A. This resistor is in series with a 28 resistor, and the series combination is connected across a battery
A starcruiser, measured by its passengers to be 80.0m long, whizzes by an Earthling at speed 0.992c. What length does the Earthling measure the ship's length to be
What is the mass of water before the hot iron is put into the cup? How much energy is required to melt all of the ice, How much energy leaves the iron in the form of heat
A uniform meter stick is in static rotational equilibrium when a mass of 220 g is suspended from the 5.0 cm mark, What is the mass of the meter stick
Mary needs to row her boat across a 200 m-wide river that is flowing to the east at a speed of 1.1 m/s. Mary can row with a speed of 2.4 m/s. What is her speed with respect to the shore
An electron with kinetic energy of 6.0 x 10-16 J is moving to the right along the axis of a cathode-ray tube. There is an electric field vector = (2.0 x 104 N/C) j in the region between the deflection plates.
The potential energy U(r) between any two atoms, when given as a function of the distance between their centers, do the atoms behavemost like a simple harmonic oscillator
A helium balloon ride lifts up passengers in a basket. Assume the density of air is 1.28 kg/m3 and the density of helium in the balloon is 0.18 kg/m3. What is the magnitude of the buoyant force on each person
A box is sliding with a speed of 4.50 m/s on a horizontal surface when, at point P, it encounters a rough section. What is the coefficient of friction at the stopping point
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