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A skater is initially spinning at a rate of 12.5 rad/s with a rotational inertia of 2.87 kg · m2 when her arms areextended. What is her angular velocity after she pulls her arms inand reduces her rotational inertia to 1.64kg · m2?
A horizontal force of 200N is applied to a 55kg cart by a child across a 10m level surface. The cart accelerates at 2m/s^2. What force of friction acts to retard the motion of the cart
Assume that the temperature of the bullet doesn't change appreciably, how much ice is melted as a result of the collision.
Suppose the temperature of 4.56 L of ideal gas drops from 359 K to 275 K. Find the number of moles of gas
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km, What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity
One mole of an ideal diatomic gas is heated from a temperature of 19 degrees C to a temperature of 149 degrees C. How much heat in joules must be supplied if the volume is kept constant during heating?
It is found experimentally that the electric field in a certain region of Earth's atmosphere is directed vertically down. At a certain location, Find the net amount of charge contained in a cube
A "sun yacht" is a spacecraft with a large sail that is pushedby sunlight. Although such a push is tiny in everydaycircumstances, it can be large enough to sent the spacecraftoutward from the Sun on a cost-free but slow trip. how fast will it then..
When 195 g of a substance is heated to 335°C and then plunged into a 100 g aluminum calorimeter cup containing 134 g of water at 13.0°C, What is the specific heat of the substance
at what distance along the central axis of a uniformly charged plastic disk of radius r 0.110 m is the magnitude of
A 120 V space heater has two power settings. The equivalent resistance at the two settings are 19 ? and a 37 ?, After making a guess, determine the power at the low setting
The resistivity of gold is 2.44 x 10-8 ohms.m at room temperature. A gold wire that is 0.9 mm in diameter, What is the electric field in the wire
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
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