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A 80kg person at the fair rides the famous "spinning bottomlesscylinder", (r = 4m). When the cylinder spins fast enough the floordrops away but you dont fall because of friction (fs= 0.45)
a) what is the minimal velocity the cylinder must spin so you dontfall?
b) what is the minimum centripetal force needed?
Find the rms speed of a helium molecule at 313 K. Find the rms speed of an iron atom of mass 55.9 u at 313 K. Find the rms speed of a pollen particle of mass 5.29 10-13 g suspended in water at a temperature of 313 K.
A capacitor has plates that are located .08 meters from each other with air as the material between the plates, Find the force exerted on the plates of the capacitor
A hollow, spherical shell with mass 1.90kg rolls without slipping down a slope angled at 40.0 degree. Part A Find the acceleration. Take the free fall acceleration to be g = 9.80m/s^2 Part B Find the friction force. Take the free fall acceleration to..
A Styrofoam box has a surface area of 0.86 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam
Today's terrestrial background radiation is about 50 mrem/year, mainly due to the uranium and thorium decay chains, and potassium. The earliest evidence of life on earth was about 3.5 billion years ago.
A laserpointer has a beam intensity of 55 W/m2 and a beam radius of 2.1 mm. what is the force on the car
The coldest and hottest temperatures ever recorded in Switzerland are -43.2 F (231 K) and 106.7 F(315K) respectively. What is the speed of sound in air at each temperature
An air puck of mass m1 = 0.30 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes by a hole in the center of the table, and a mass m2 = 1.20 kg is att..
When a high speed passenger train traveling at 113 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D = 642m ahead.
How much time is necessary to catch the car
Electrons are accelerated so that their de Broglie wavelength is .083nm. What is the kinetic energy of the electrons so that they have this de Broglie wavelength
A uniform 2.45- kg spinning disk with a radius of 0.323 m is brought to rest by a brake-pad pressed against the side 0.226 m from the rotation axis. What frictional force was applied by the brake pad
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