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Q1. A merry-go-round rotates at the rate of 0.30 rev/s with an 80 kg man standing at the point 2.0 m from the axis of rotation.
What is the new angular speed when the man walks to a point 0.8 m from the center? Assume that the merry-go-round is a solid 28 kg cylinder of radius 2.0 m.
Q2. What is the velocity of the beam of electrons that go undeflected when passing during perpendicular electric and magnetic fields of magnitude 4700 V/m and 3.6×10-3 T, correspondingly?
A gardener is using a tool as shown in the figure to pull weeds. You will notice that the tool is designed with a built in pivot point about which the torques are applied
In outer space a rock of mass 8 kg is acted on by a constant net force N during a 5 s time interval. What was the rock's velocity at the beginning of the time interval
A 50kg pullvolter running at 10 m/s vults over the bar. Her speed when she is above the bar is 1 m/s. estimate her altitude as she crosses the bar
A 250 g block of wood hangs from a light string 0.78 m long. The block is shot with a bullet of mass 4.2 g, what was the velocity of the bullet just before it hit the block
You pour 108 cm3 of ethanol, at a temperature of -10.0?C, into a graduated cylinder initially at 20.0 ?C, filling it to the very top. What will be the final temperature of the ethanol
A circuit consists of a 6.0V battery, a 37-mH inductor, and four 55 ohm resistors. Find the characteristic time for this circuit
The image of an object seen in a mirror is twice its actual size. The orientation of the image is the same as that of the object. what is the focal length of the mirror
A proton, an electron, and an alpha particle (of charge +2e) form an equilateral triangle of side length 2.19×10-10 m. What is the electric potential energy of the three-particle system
Because it has the highest binding energy per nuclion of all nuclides, 62 over 32 Ni may be described as the most strongly bound. Its neutral atomic mass is 61.928349amu.
River Pascal with a volume flow rate of 6.1×105L/s joins with River Archimedes, which carries 1.15×106L/s , What is the speed of the water in the Bernoulli River
The track is 400 meters lonf and linear. Car A accelerates at 3 meters per second and Car B accelerates at 3.1 meters per second. How far behind is Car A when Car B passes the finish line
What would the first allowed orbital be for a particle whose mass is 2 x 10 ^ -39 kg and velocity was 30% the speed of light
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