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If an Ice skater with moment of inertia of 80 kgm^2 and angular velocity of 4 rad/s reduces her moment of inertia to 60 kgm^2 by adjusting her arms, determine the change in the rotational kinetic energy of the ice skater by adjusting her arms.
a 20-kg mass is attached to a spring. if the frequency of the simple harmonic motion is 2pi cycles what is the spring
The figure below shows a resistor of resistance R =6.33 Ω connected to an ideal battery of emf = 14.0 V by means of two copper wires. Each wire has length23.3 cm and radius 4.10 mm. In dealing with such circuits in thischapter, we generally neglec..
When released, the textbook slides on a horizontal tabletop with coefficient of kinetic friction k = 0.30. Use the work-energy theorem to find out how far the textbook moves from its initial position before coming to rest.
A 2.1g plastic bead charged to -5.0nc and a 3.6g glass bead charged to 18.0nc are 1.6cm apart (center to center).what are the magnitudes of the accelerations of the plastic bead and the glass bead? What are the directions of the accelerations of the ..
question1an airplane with a speed of 79 ms is climbing upward at an angle of 48deg counter clockwise from the positive
Two flat surfaces are exposed to a uniform, horizontal magneticfield of magnitude 0.65 T. The first surface is tilted at an angleof 23° from the horizontal, and a net magnetic flux of 6.0 x10-4 Wb passes through it.
T thin lense with a focal length of 50 cm is placed 100 cm from an object. How far behind the lense should we place a screen
A disoriented physics professor drives a distance 3.25 km North, then a distance 2.60 km West, and then a distance 1.70 km South, Find the magnitude of the resultant displacement
Convex mirrors are often used in sideview mirrors on cars. Many such mirrorsdisplay the warning “Objects in mirror are closer than they appear.” Assume a convex mirror has a radius of curvature of magnitude 14 m and that there is a car that is 11 ..
Find the total sound intensity that the man hears after he has walked 3.7 m directly toward one of the speakers
A ball with mass 2.5 kg is moving in outer space with a velocity of 6.0 m/s horizontally, Find the final velocity of the pair
a copper block is removed from a 310 degrees celsius oven and dropped into 1.20kg of water at 20.5 degrees celsius. the
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