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1. A skater extends her arms, holding a 2kg mass in each hand. She is rotating about a vertical axis at given rate. She brings her arms inward toward her body in such a way that the distance of each mass from the axis changes from 1m to 0.50 m. what is her new rate of rotation.
2. A mass m is attached to a massless spring with a force constant k. The mass rests on a horizontal frictionless surface, The system is compressed distance x from the spring's initial position and then released. Find an expression for the momentum of the mass when the spring passes its equilibrium point.
A charge per unit length given by λ(x) = bx, where b = 12nC/m2, is distributed along the x axis from x = +9.0 cmto x = +16 cm. If the electric potential at infinity is taken to be zero, what is the electric potential at the point P on the yaxis at..
An athlete executing a long jump leaves the ground at a 20° angle and travels 6.30 m. how much longer would the jump be
A 0.80-kg book moves verticallyupward a distance of 17 m, andthen vertically downward 17 m,returning to its initial position. How much work is done by gravity during the upward motion of the book?
A steel cable is to support an elevator whose total (loaded) massis not to exceed 3100 kg. calculate the minimum diameter for the bold
A series ac circuit contains a 330ohm resistor, a 13.0mH inductor, a 2.50microF capacitor, Find the average power delivered to the entire circuit
Tarzan, whose mass is 80.0 kg, swings from a 3.00-m vine thatis horizontal when he starts. What is the height of the highest tree limb they can reach on the upwardswing
a record is turning at the rate of 33 r.p.m. when the 45 r.p.m. button is pressed. what is the angular acclereration of the record
A line of positive charge is formed into a semicircle of radius R = 80.0 cm, Calculate the total force on a charge of 4.00 µC placed at the center of curvature
A sphere is charged with electrons to ?1 × 10^-5 C. How many electrons make up this charge
An object is located in front of a concave mirror at a distance of distance of 24 centimeter. The focal length of the mirror is 10 centimeter from the vertex. Evaluate what is the size of the image
A sledge loaded with bricks has a total mass of 18.4 kg and is pulled at constant speed by a rope inclined at 19.2° above the horizontal. What is the mechanical energy lost due to friction
Two adjacent resonant frequencies of an organ pipe are found to be 500 Hz and 600 Hz. What is the length of the pipe
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