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The entrance of a science museum features a funnel into which marbles are rolled one at a time. The marbles circle around the wall of the funnel, eventually spiraling down into the neck of the funnel. The internal radius of the funnel at the top is 0.44 m. At the bottom,the funnel's neck narrows to an internal radius of 0.049 m. A 5.2 × 10-2 kg marble begins rolling in a large circular orbit around the funnel's rim at 0.28 rev/s.If it continues moving in a roughly circular path, what will the marble's angular speed be as it passes through the neck of the funnel?(Consider only the effects of conservation of angular momentum.)Answer in units of rad/s.
a wheel of diameter 144 cm has an axle of diamter 15 cm. a force of 150N is exerted along the rim of the wheel. What force should be applied to the outside of the axle
A 19g ball of clay is shot to the right (in the positive -direction) at 21m/s toward a 38g ball of clay at rest. The two balls of clay collide and stick together. Call this reference frame S. 1. What is the total momentum in frame S?
Consider a bright star in our night sky. Assume its distance from Earth is 20.9 light-years (ly) and its power output is 4.00 1028 W, about 100 times that of the Sun. Find the intensity of the starlight at the Earth.
A 5 kilogram block is suspended from the ceiling of elevators the elevator accelerates downward at 3.0 m/s squared. Evaluate what is the tension force on the block
A metal wire has a resistance of 10.00? at a temperature of 20.0°C. If the same wire has a resistance of 10.55? at 90.0°C, what is the resistance of this same wire
A light rope wrapped around a disk-shaped pulley is pulled with a force of 0.53 N. Find the angular acceleration of the pulley, given that its mass is 1.3 kg and radius is 11 cm.
A cubic box of volume = 0.34300m^3 is filled with air at atmospheric pressure at 20.000*C. What is the net force on one side of the box
An excited iron (Fe) nucleus (mass 57u) decays to it's groundstate with the emission of a photon. The energy availabel from thistransition is 14.4 KeV, What is the wavelength of the emitted photon
An 815-kg race car can drive around an unbanked turn at a maximum speed of 61 m/swithout slipping. The turn has a radius of curvature of150 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of2500 N on the ..
A 51kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 43.5o above the horizontal. If the tension in the rope is 115 N, how much work isdone on the crate to move it 8.0 m?
Two resistors have resistances R(smaller) and R(larger), where R(smaller)
A rock is launched from a wall 15 m above a moat at a speed of 29m/s at an angle of 36 deg above horizontal. How far from the wall does the launched rock hit the ground?
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